PLATE XLVII. 
I, 2. Coehlicarina Expansa. (Expanded Cochlicarina .) Sub-orbicular, smooth; body, with acute carina; spire conical, 
depressed, with four volutions; apex acute; body, with callus at columella. 
3,4. C. Solarioides. ( Sun-like Cochlicarina.) Sub-discoidal; spire depressed, with four volutions, and indistinct carina at 
base of each; body flat, carinated above, convex beneath; callus narrow; with obscure strife. 
5,6. C. Polita. (Polished Cochlicarina.) Sub-rotund, smooth, polished; spire sub-conic, with five volutions, with carina at 
base; body, divided from spire by impressed fillet; callus thin ; aperture sub-quadrangular. 
7,8. C. Compressa. (Compressed Cochlicarina.) Sub-globose, smooth, thick; spire depressed; carinated; base convex ; callus 
broad; aperture angular. 
9,10. Helix Gentii. (Gent's Helix.) Sub-globose, smooth; body large, spire small, with three volutions; apex obtuse; with 
spiral, hollow sulcus; aperture elliptical, expanded; with obscure lines of growth. 
II, 12. Bulla Convoluta. (Convoluted Bulla.) Cylindrical, smooth; aperture narrow, linear; vertex obtuse, sub-truncated, 
perforate; umbilicus deep. 
13,14. B. Elliptica. (Elliptical Bulla.) Elliptical, elongated; vertex perforate; aperture linear; with fine, transverse stria?. 
Length, J in. 
15,16. B. Acuminata. (Acuminated Bulla.) Elongated, cylindrical; vertex acuminated; aperture linear; outer lip, rising 
above vertex, and produced to a point; with fine, transverse strife. 
17,18. B. Constricta. (Constricted Bulla.) Sub-cylindrical, with central constriction; vertex truncated, perforate; aperture 
linear; base rounded; with obscure, spiral strife. 
19. B. Elongata. (Elongated Bulla.) Elongated, smooth, narrow, umbilicate ; outer lip plain, hollow in centre; aperture con¬ 
tracted above, round below. 
20. B. Filosa. (Thready Bulla.) Elliptical; aperture narrow above, rounded beneath; outer lip expanded; with many, 
transverse strife. 
21,22,23. Utriculus Crenatus. (Crenated Utriculus.) Oblong-ovate; body large, ventricose; spire small, acute, with four 
inflated volutions ; aperture elongated, narrow, base rounded; outer lip sharp ; columella, with a series of minute crenulations. 
24, 25. B. Attenuata. (Attenuated Bulla.) Elliptical; aperture long, curved; outer lip, extending below top of body; body 
truncated above, perforate ; with fine, transverse strife. 
26. U. Humeralis. (Shouldered Utriculus.) Sub-cylindrical, smooth ; body long; spire short, with four sub-turreted volutions • 
apex acute ; aperture oblong-oval; outer lip, with flexure near centre; inner lip reflected on columella. 
27,28,29. U. Elongatus. (Elongated Utriculus.) Elongated, sub-cylindrical; body long; spire, with four volutions; apex 
obtuse ; aperture short, oblique; outer lip expanded; with fine, spiral strife. Fig. 28, natural size. 
30. U. Glaber. (Smooth Utriculus) Cylindrical, oblong; body large, spire short, with three inflated volutions; aperture 
elongated; outer lip straight; surface smooth, with wide-set, transverse stria?; base rounded. 
31,32,35. Ancylus Elegans. (Elegant Ancylus.) Sub-conical, convex, smooth; apex oblique; aperture sub-ovate; with minute 
divergent stria?. 
33,3b H. Globosa. (Gttobular Helix.) Globular; body large; spire short, obtuse, with three, broad, tumid volutions, with 
spiral striae, crossed by lines of growth; aperture semi-lunate; outer lip reflected; umbilicus, concealed by glazing on columellar lip. 
36, 37. Calyptraea Echinulatum. (Spined Calyptr&a.) Smooth, conical, depressed, oblique, with three or four volutions ; 
body, with series of short spines. Diameter, i} in. 
38, 39. C. Rectum. (Rectaiigular Calypircna.) Conical; apex central; body inflated; spire, with two or three volutions ; vertex 
acute, nearly central; aperture circular; internal plate rectangular, with one volution; columella slender; surface, with concentric 
strife. 
40, 41, 42. C. Obliquum. (Oblique Calyptrcoa.) Sub-conic, depressed, smooth, oblique; vertex on one side ; aperture circular; 
internal transverse partition, reflected near columella. Fig. 42, natural size. 
43, 4k Pileopsis Unguis. (Hoof Pileopsis.) Sub-depressed, sub-orbicular; vertex recurved, oblique; convolution, small, acute; 
base sub-oval ; outor lip even. 
4o. C. Tuberculatum. (Tuberculated Calyptraea.) Sub-conic, inflated, oblique; spire, with two or throe volutions; apex 
obtuse ; with spiral bands of rugose tubercles; aperture sub-rotund. 
46, 47. C. Spinulosum. (Spinous Calyptraea.) Sub-conic, ventricose, with three or four volutions; vertex central; apex acute; 
with many, short, reflected, hollow spines ; aperture orbicular; outer lip curved. Diameter, H in. 
48,51. P. Neritoides. (Neritaformed Pileopsis.) Obliquely spiral; spire depressed, with two volutions; apex blunted; 
aperture oval; outer surface, with strong lines of growth, concentrically striate. 
49. P. Striatus. (Striated Pileopsis.) Oval; apex, near one end; vertex incurved, free; arcuated from base to vertex ; surface 
with strong, radiating strife; crossed by many lines of growth; base sub-oval. 
50,55. P. Trilobus. (Three-hbed Pileopsis.) Sub-conic, smooth; arcuated from base to vertex; tapering, acute at vertex; 
aperture trilobate; base undulous. 
52. P. Tubifer. (Tubed Pileopsis.) Elongated, smooth, arcuated; vertex slightly curved; with three, divergent, spinous ridges 
near vertex, and three rows of tubular spines. 
53 P. Vetustus. (Ancient Pileopsis.) Sub-conical, arcuated, smooth ; vertex blunt and bent; sides, with two or thi'ee irregular 
undulations, crossed by waved lines of growth ; aperture oblong-ovate. 
54. P. Angustus. (Straitened Pileopsis) Sub-conic, spiral, smooth; vertex on one side; obtuse, with transverse lines of 
growth; aperture elongated, expanded. 
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