The aperture is oblique, ovately rounded. The aperture is cerulean-white in colour. The upper part of the aperture is not acute. The peristome is straight, thick, blunt, often outwardly blackish.
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The solid shell is ovately turreted with an acuminated spire. The whorls are smooth, depressed round the upper part, obliquely plicately tubercled. The siphonal canal is very short. The anal sinus is large.
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The length of the shell varies between 4 mm and 6.4 mm. The orange-banded shell is ovately oblong. The whorls have a narrow shoulder. They are longitudinally strongly ribbed with white, obtuse ribs close-set.
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Annals and Magazine of Natural History (4)3: 340-344. page 343. In the adult shell the last whorl is angulate below the suture and at the periphery. The shell is imperforate, ovately conical, with the apex eroded.
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The length of the shell varies between 6 mm and 12 mm. The whitish shell is somewhat thin, ovately fusiform and subventricose. It contains six whorls, slightly planate above the carina. The aperture is nearly equally contracted above and below.
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Ovately conic. Shaped like an egg, but with a somewhat conic apex, as some gastropods. Oviparous. Bringing forth young in an egg which is hatched after it is laid. Ovisac. A pouch in which the eggs or embryos are contained. Ovoviviparous.
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The length of the shell varies between 15 mm and 45 mm. The shell is ovately turbinated, slightly perforated, somewhat tubulous and spirally ridged. The ridges are smooth alternately rather smaller, squamose. The scales are most prominent on the body whorl.
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The length of the shell attains 6.3 mm, its diameter 2.5 mm. (Original description) The shell is ovately fusiform. The color is light brown, whitish at the base of the body whorl and outer lip. It contains 6 whorls with 1½ whorls in the apex.
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The perianth-segments are in two whorls of three. Segments in the outer whorl are small and spreading while the inner whorl forms fruit valves, which are widely ovately-triangular. The seeds produced are dry and reddish brown. This plant blooms June through September.
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The length of the shell attains 14 mm, its diameter 5⅓ mm. The ovately turreted shell is white with yellowish brown ribs (of which one is white). The body whorl is encircled by a white line. The back of the outer lip shows a brown spot.
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The length of the shell attains 10 mm, its diameter 4 mm. The solid, subfusiform shell is ovately oblong and obtusely shouldered, strongly longitudinally ribbed (eight in the body whorl) and transversely substriate. The shell contains six whorls with a distinct suture. The aperture is narrow.
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The length of an adult shell attains 16.5 mm, its diameter 6.5 mm. It is superficially similar to Benthofascis conorbioides, but it does not resorb the inner whorls. (Original description) The biconic, moderately thick shell has an ovately fusiform shape. Its surface is spirally furrowed, smooth and shining.
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The length of the shell attains 18 mm. (Original description) The rather solid shell has an ovately fusiform shape. It is of a dull chalky- grey colour. The shell contains 7 whorls, angulated at the upper part, closely longitudinally ribbed and transversely ridged, forming flattened nodules at the points of intersection.
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The length of the shell attains 18.5 mm, its diameter 6.5 mm. (Original description) The shell is ovately fusiform, turreted, pale fleshy brown. It contains 8 whorls. The first are globular, glassy, smooth, the rest concave above, angled at the middle and a little concave below the angle, longitudinally flexuously obsoletely plicated.
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Like other lady's slipper orchids (subfamily Cypripedioideae) the Cypripedium reginae has flowers with a pouch-shaped labellum. Cypripedium reginae is a large, terrestrial orchid, growing in height with many stems from the same rootstock. Each stem has three to five alternate, pubescent leaves. Each ovately shaped leaf grows up to long and broad.
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The size of an adult shell varies between 22 mm and 58 mm. The shell is ovately conical and rather solid. The spire is broadly channeled and at the base distantly grooved. The color of the shell is white, with rust-brown flexuous longitudinal flames, and a white central band, with revolving row of spots.
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The length of the shell varies between 8 mm and 26 mm. (Original description) The ovately-fusiform shell has a sharp spire and a short siphonal canal. It is moderately strong, yellowish, with a faint red-brown band at the base of the body whorl. The shell contains 9 whorls, of which about form a protoconch with obscure sculpture.
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The length of the shell attains 16.5 mm, its diameter 5 mm. (Original description) The strong, ovately-fusiform shell has a very short siphonal canal. It is yellowish-grey, with a few of the lirae reddish-brown. It contains 9 or 10 whorls, (the topmost one broken) of which the upper one is nearly smooth, but with traces of criss-cross lines.
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The length of the shell attains 23 mm, its diameter 11 mm. The white ovately fusiform shell contains 10 whorls. In some of the upper whorls the upper margin just beneath the suture is also more or less nodose. The tubercles just above the suture are crossed by two or three sulci, so that each of them is tripartite or quadripartite.
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The round rocksnail is a pleurocerid snail and its shell grows to about 20 mm (0.8 in) in length. The shell is subglobose, with an ovately rounded aperture. The body whorl is shouldered at the suture, and may be ornamented with folds or plicae. Color may be yellow, dark brown, or olive green, usually with four entire or broken bands.
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The length of the shell attains 7 mm, its diameter 2.5 mm. The shell has an ovately acute shape with 6-7 slightly convex whorls. The surface of this small monochrome brown snail is characterized by fairly dense, rounded longitudinal ribs, covered by regular raised striae, forming a coarse grid. The aperture is narrow and somewhat shorter than half the length of the shell.
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The size of the thin, ovately oblong shell varies between 9 mm and 12 mm. The color of the shell goes from brown to whitish. The protoconch is paucispiral with its axis slightly deviated from the main axis. The teleoconch consists of 3 ¼ rounded whorls, axially crossed by 15 to 20 broad, rounded ribs, less conspicuous at the margin of the oblong aperture (peristome).
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The leaves of the C. mercadoi are simple, opposite or subopposite, smooth, pale green, ovately-oblong or broadly lanceolate. The leaves are also sometimes subelliptic, usually 8 to 20 centimeters long and 4 to 6 centimeters wide, and are pointed at both ends, with petioles 5 to 15 millimeters long. The inflorescence is erect and grows from the uppermost leaf axils, about 10 centimeters long. The petals are smooth and rarely exerted.
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The length of the shell attains 9.5 mm, its diameter 3 mm. (Original description) The solid shell is ovately fusiform. It is pale fleshy white, banded with yellow on a series of nodules around the lower half of the whorls, stained with reddish brown between the nodules, with a second series of yellow gemmules, with a reddish-brown lira beneath it, situated a little below the middle of the body whorl. The shell contains 7½ whorls, the apical ones large, the rest undulately carinated above at the suture, then concave, coarsely ribbed and spirally lirate.
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