624 MOLLUSCA. 



spire detached, with a deep umbilicus; volutions connected hy longitudinal 

 ribs : body extremely ventricose. One inch and a half long. Inhabits the 

 Indian ocean. 



47. Vermetics hnnbricalis.— The Worra-iike Vermotus. Plate l.vxiv. fig-. 

 24 Variously twisted; reddish-brown, sometimes clouded with darker 

 brown. Two to four inches long-. Inhabits the African seas. 



48. Pyramidella terebclluiu.— The Wimble Pyramidella. Plate Ixxiv. 

 fig. 26. Smooth, glossy, white, with reddish.browu fasciae ; columella re- 

 curved ; inside of the lip smooth. One inch and one-fourth long. Inhabits 

 the American seas. 



49. Tornatetta fasciata.— The Banded Tornatella. Plate Ixxiv. fig. 27. 

 Covered Avith fine transverse striae ; produced, apex acute; aperture strait, 

 encd, columella with one plait; purplish-red, with two white transverse 

 fasciie. Inhabits the coast of Britain. 



hi). Haliolis asinina. — The Assinine Haliotis. Plate Ixxiv. fig. 28. Inter- ' 

 nal margin very broad, inside pearly, smooth, shining, iridescent, reflecting 

 green, pink, and orange ; back clouded with brown and green, and striated 

 longitudinally, oblique ; spire very short. Two and a half inches long. 

 Inhabits the sea at Molucca. 



51. Stomatla phymotis.— The Tumoured Stomatia. Plate Ixxiv. fig. 29. 

 Ovate-obUmg, back convex, striated, nodulous, and white ; spire small, con- 

 torted ; lip thin and acute. Three and a fourth inches long. Inhabits the 

 Indian Ocean. 



52. Stomatella imhricata The Imbricated Stomatella. Plate Ixxiv. fig. 



:jO. Suborbicular, convex, somewhat depressed, rough, having thick-set 

 transverse ribs, covered with imbricated scales grayish-brown. One inch 

 and a half long. Inhabits the Indian Ocean. 



53. Sigaretxis concavus.—'i he Concave Sigaretus. Plate Ixxiv. fig. 25. 

 Ovate, back convex, covered with transverse undulated striae ; reddish.yel. 

 low, spire white, somewhat prominent ; aperture expanded, concave ; urn- 

 bilicus deepish. Inhabits the Indian Ocean. 



51. lantkina communis.— The Common lanthina. Plate Ixxiv. fig. 19. 

 Extremely fragile, of a beautiful violet hue ; aperture triangular. With a 

 small notch on the margin of the outer lips. One inch loug. Inhabits the 

 Atlantic and Mediterranean. 



55. Natica canrena.— The Canrena Natica. Plate Ixxiv. fig. 15. Subglo.. 

 bular, smooth ; fawn-coloured, with bands and interrupted rays of reddish- 

 brown, and zigzag lines and streaks ; base of body and inner hp white, deep- 

 ly umbilicated ; spire a little prominent. One inch and three-fourths long. 

 Inhabits the West Indian Ocean. 



66. Nerila pelcronta.— The Monstrous Nerita. Plate Ixxiv. fig. 13. Thick, 

 transversely sulcated ; ash-coloured, or reddish-yellow, with variously co- 

 loured bands ; inner lip with two crenulatimis, outer lip with two deep 

 notches near its internal upper edge, and a bloody mark at the base of the 

 inner teeth. One inch long. Inhabits the seas of South America. 



57. Neritoides litteralis.— The Shore Neritoides. Plate Ixxv. fig. 24. 

 Smooth, covered with an olive-greeu, yellow, brown, or other coloured 

 epidermis, sometimes beautifully banded or chequered beneath it; inside 

 generally purplish-brown ; body very large ; spire very .short and depress, 

 ed. Five-eighths of an incl) long. Inhabits the shores o.f Northern Europe. 



68. NeritinaJ!uv>atilis.~The I-'resh- Water Neritina. Plate Ixxiv. fig. 14. 



