The aperture is widely ovate. The outer lip is thin and deeply sinuated posteriorly. The lip is inconspicuous. The columella is long and twisted.
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The suture is deep and oblique. The outer lip is flexuous, retreating, sinuated above. It is smooth within. The columellar tooth shows only a slight obscure fold.
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The sutures are hardly impressed. The body whorl is slightly convex with 7 - 8 carinae. The small aperture is elongate-oval. The outer lip is deeply sinuated.
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The last whorl descends somewhat, giving the shell a slightly distorted appearance. It is girded with about twelve transverse costae, a few at the base being smaller than five principal ones around the middle. The aperture is bluish within, faintly stained with olive-brown near the margins. The peristome widely and deeply sinuated on the outer lip in the concavity of the whorl, arcuate and prominent in the middle, then shallowly sinuated again.
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The outer lip is markedly sinuated at the suture and incrassate outwards.Smith E.A. (1882). Diagnoses of new species of Pleurotomidae in the British Museum. Annals and Magazine of Natural History. ser.
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Proboscis short almost concealed. Apical margin of forewings crenulated with apical angle sub-rounded. Apical margin of hindwings slightly sinuated, with apical angle sub-rounded. Anterior and posterior margin of both wings are convex.
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The shell has a fusiform shape. It is mostly longitudinally ribbed The spire is elongated, turriculated, acuminated. The lip is very finely rugosely denticulated. The lip is thickened and slightly sinuated at the upper part.
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A. tetracarinatus reaches a length of 1.7 to 2.1 mm. The body is dark. The tibiae of the front legs are not sinuated at the tip. The abdomen of the males do not possess any protuberances.
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The aperture has an oval shape. The outer lip is sharp and slightly sinuated. The siphonal canal is very short.Sowerby G.B. III 1893, Descriptions of fifteen new species of shells of the family Pleurotomidae. Proc. Zool. Soc.
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The outer lip is arcuate and strongly sinuated. The unique specimen is straw-coloured, with a single brown blotch in front. Sowerby III, G. B. (1896). List of the Pleurotomidae of South Australia, with descriptions of some new species.
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The body whorl measures half of the total height of the shell. It finishes in a long, narrow and slightly twisted siphonal canal. The elongated aperture is angular at the top. The columella is sinuated at the top, then a little oblique.
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It contains about 15 diagonal riblets that are less attenuated in the last whorls. The aperture is small. The angle on top of the lip is not deeply sinuated. This species has the whorls much contracted at the lower part and prominent at the rounded angle.
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The rather thin, acute, coeloconoid (=approaching conical shape but with concave sides) shell is imperforate or rarely umbilicate. The whorls are smooth, often polished and spirally ridged or granular. The body whorl is angulated at the periphery. The aperture is quadrangular, sinuated at the base and slightly oblique.
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They are russet-yellow, the last ends in a sinuated lip. The upper part of each is scored, with short straight bars above and cancellations below. The shell contains 6½ whorls besides those of the protoconch. Above they have a sloping, just appreciably concave shoulder, about the middle each is obtusely carinated.
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Protoconch: The outer shelly layer has scaled off and it is impossible to give a description. The nucleus is globular and obliquely tilted. The seven whorls are narrowly angled and excavated above, their sides almost straight. The base of the shell is convex and narrowed to a short and anteriorly sinuated beak.
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The anal sinus is in most cases obsolete. The outer lip is acute, smooth within, occasionally scarcely sinuated posteriorly. The columella is straight, bearing a number of short plicae or teeth upon it in the middle and slightly transversely lirate.G.W. Tryon (1884) Manual of Conchology, structural and systematic, with illustrations of the species, vol.
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Mpanjaka pastor is a moth of the family Erebidae first described by Arthur Gardiner Butler in 1882. It is found in central Madagascar. The wings of this species are emerald green, spotted with snow white, irregularly striped with grey and crossed by three sinuated black lines. It wears a 3-shaped discocellular black spot.
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The first two pairs of the legs have a reddish front side. The upper side of the forewings are acajou- brown with a large red-orange spot at its base and two sinuated lines of the same colour. The underside is pale pinkish. The hindwings have a similar coloration but their underside is whitish.
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The shell grows to a height of 6.5 mm. The shell is a rather narrow flat-based cone that is sharply angulated. The shell is small, thin, delicate, smooth, glassy, and nacreous under a thin white calcareous surface. Sculpture: There are longitudinals, which are faint, hairlike and sinuated, showing the old lines of growth.
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The spire is high, conical, subscalar. The apex is conically turbinate and consists of 4¼ small, convex, chestnut-coloured whorls, of which the last has a deeply sinuated lip-edge. They are scored with fine raised threads, which on the upper part of the whorls are curved and below are reticulated. There are 5½ whorls besides the embryonic apex.
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The aperture is small, a little more than one third the entire length of the specimen. The outer lip is not thickened, rather deeply sinuated in the concavity at the upper part of the whorl. The columella is smooth, a trifle oblique, very slightly tortuous, covered with a moderately thick livid enamel. The siphonal canal is ery short.
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The outer lip is sharp, advancing far across the body towards the columellar lip. The columellar lip is depressed upon the umbilicus, then rounded and sinuated, slightly toothed at the point of the pillar. The umbilicus is wide and deep, but internally narrowed. The peculiarly high narrow spire and the vaulted prickles are very characteristic features of this species.
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The teleoconch contains about 8 whorls, regularly increasing, a little concave at the narrow shoulder, andconvex below it. The body whorl is flatly rounded below the angle, but faintly contracted at the base. The sutureis distinct and not deep. The aperture is oblique, narrowly ovate, produced below into a short straight and widely open siphonal canal, sinuated at the base.
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Later, in 1980, it has been stated by Bouchet & Warèn that there is a high variation within the arctic forms of this genus, such as the outer lip showing all transitions from sinuated to nonsinuated Bouchet, Philippe, and Anders Warén. "Revision of the northeast Atlantic bathyal and abyssal Turridae (Mollusca, Gastropoda)." Journal of Molluscan Studies 46.Supplement_8 (1980): 1-119.
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The body whorl is subacutely angled above, then a trifle convex at the sides, and being much attenuated anteriorly has a somewhat piriform appearance. It is sculptured with fine lines of growth and transverse indistinct striae or shallow grooves, which around the base are much deeper. The aperture is very narrow. The outer lip is thin and moderately sinuated above the angle.
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The wingspan is 17–19 mm. The forewings are white, with three large fuscous areas along the costa and a marginal and submarginal transverse row of fuscous dots at the apex, the marginal row darker and giving a sinuated effect to the termen. Another area of dark fuscous raised scales is found at the anal angle. The hindwings are very light fuscous.
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The spire is rather high, conical, scalar and sharp. The protoconch consists of 3½ very small turbinate whorls, of which the extreme tip is immersed and tabulate. They are chestnut- coloured, and are scored with excessively fine threadlets, which are straight and longitudinal above but cancellate on the lower part of the whorls. The last of these embryonic whorls ends with a deeply sinuated outer lip.
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The outer lip is thin and broken, not descending. The inner lip is shortly but flatly bent over the umbilicus, and here it is patulous and sinuated, it then advances in a straight line toward the base. It is toothed in the middle by a strongish spiral protuberance at which point it projects. But from this to the junction with the base it is thin and retreats.
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The aperture is mutilated in all available specimens, narrowly pyriform, expanding slightly posteriorly. The outer lip is widely flaring incrementally, narrowly but deeply sinuated in front of the anterior primary, distantly lirated within. The lirae are not persistent to the margin. The parietal wall is thinly glazed, not entirely concealing the lirae upon the base of the body and the columella, which continue far within the aperture.
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The length of the shell attains 10 mm. (Original description) The pure white shell is fusiform and slender.. The longitudinal sculpture shows six narrow subacute prominent ribs on each whorl, which are sinuated posteriorly on the right side, and which are continuous along the spire like a species in the genus Murex.The spiral sculpture consists of very numerous microscopic spiral striae in the intercostal spaces. The apex is acute.
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The outer lip is thickened exteriorly, arcuate in the middle, faintly sinuated towards the lower extremity, and rather deeply notched in the slight constriction of the whorl near but not at the suture. Smith, E.A. 1884. Mollusca. pp. 34–116, 487–508, 657–659, pls 4–7. In, Report on the Zoological Collections made in the Indo-Pacific Ocean during the voyage of the H.M.S. 'Alert ' 1881-2.
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The outer lip is not thin, and has a slight callus just within it. It is slightly sinuated on the base at the outer corner. The columellar lip on leaving the body, bends over very flatly so as to cover the umbilicus, after which it curves round to the left. It has a very blunt tubercle in the middle, is a little reverted, and has a very slight furrow behind it.
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The forewings are yellow, scattered with brown scales, the markings grey brown. The antemedian line from the costal one-fourth is sinuated to one-third of the posterior margin. The proximal cellular stigma is circular and the distal cellular stigma is kidney shaped. The postmedian line is zigzaggy serrate, from the costal three-fourths, excurved around the cell, and strongly inflexed below the distal cellular stigma, then to two-thirds on the posterior margin.
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Sculpture : there are about 45 longitudinals. These are hair-like, strongly sinuated, flexuous, for they advance markedly at the periphery, where they are each ornamented by an elongated curved tubercle, and on the base they again retreat so as to form a sinus. On the earlier whorls these longitudinals are much more distinct than on the later, and each starts from a little bead, which lie close to the suture, but these beads are very feeble on the body whorl. In the intervals of the longitudinals and parallel to them are very faint growth lines.
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There is a slender white line commencing at the base and following the costal margin, which is bent downwards and forms a sinuous outer edge to the basal patch, reaching the dorsal margin obliquely before the middle. Another slender white line which commences below the middle of the costa is sinuated outwards and downwards to the anterior edge of the dark apical fourth, where it meets a shorter, slender white line, which reverts obliquely to the dorsal margin. Along the extreme apical margin is a narrow whitish line enclosing a short series of black dots. The hindwings are grey.Proc. Zool. Soc. Lond.
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The aperture is brownish within, with a single white central zone, and a white patch parallel with the margins of the outer lip, corresponding to a stout exterior submarginal varix, and stained with dark brown between this and the thin prettily crenulated edge of the outer lip. The outer lip is curved and very shallowly sinuated towards the base, and finely sulcated within, but at the edges. The sinus is deep, at the suture. The columella is a little oblique and tortuous, whitish, without markings or callosity, only furnished with a small whitish tripartite tubercle at the upper part, just a little below the sinus, and connected with the suture by a thin callus.
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