WORMS. TESTACEA. 64. Vermiculum. 199 



Walker. Min. shells./. 15. Adams Microsc. t. 14./. 8. 



Shell the eighth of an inch long, white or cinereous, a little con» 

 tracted at the margin, with the smaller end closed and furnished 

 ■with a small round protuberance. 



594. D. Trachea. Ferruginous, cylindrical, curved, with 

 numerous close-set strong annulations, truncate and 

 imperforate at the smaller end. 



Montague Prit. She tils- p 497. tab. 14./. 10. 



Shell rather more than the eighth of an inch long, with a small 

 round protuberance at the closed end : differs from the laft, in 

 being more curved more strongly and regularly wrinkled, and 

 in having the margin of the aperture hot contracted. 



595. D. glabrum. Glossy-white, cylindrical, curved, 

 quite smooth, closed rounded and slightly margined 

 at one end. 



Montague Brit. Shells p. 407. n.6. 



Shell hardly a line long, equal in size its whole length) without 

 striae or wrinkles; aperture orbicular. 



6*. VERMICULUM. 



A . More or less convolute. 



596. V. incurvatum. White, semi transparent, straight, 

 with 3 close whorls at the smaller end. 



Walker minute Shells/. 1 j, Adams Microsc. t. 14./. 7. 



2. With a single whorl at the tip, pervious. > 



Walker Minute Shells / 12, Montague p. 518. S. pervium. 



Shell hardly a line long, refembling Nautilus femilituus, but is 

 quite fmooth, cylindrical, without fyphon or internal chambers. 



597. V. bicome. White, opake, semilunar, Mated is 

 the middle. 



Walker minute Shells/. 2. 3. Adams Microsc. t. 14./. 2. 3. 

 Sheila line long, tapering to each end. 



598. V. Seminuhim. White, opake, smooth, oval, com- 

 pressed, with % or 4 whorls. 



Walker Minute Shells/. 1. linn. Trans, v. t.\./. 28-30. 



Shtllthe tenth of an inch wide, with the whorls more, or Itfs 

 ©rbicular or oval t aperture compressed, femilunar. 



599. V. subrotundum. White, opake, suhorhicular, sub- 

 compressed, of 3 whorls, the middle-one elevated on , 

 the upper-side. 



Walker minute Shells /. 4. Montague p. 52 1 . «. 6. 



Shell half a line wide, fmooth, the middle whorl raised above the 

 other* on the upper«side, and not visible beneath : aperture angular, 

 with a yellow margin, 



600.. V, oblongum. White, opake, glossy, oblong-oval, 

 sub-compressed, with a single longitudinal suture on 



one side, 



Montague Brit. Shells p. 522. tab. 14./. o> 



Shell hardly half a line long, with a single longitudinal future on 

 one side, dividing the shell into two parts, on the other the middle 

 whorl is furrounded by a faint depression: aperture a little pro- 

 duced, oval, with a yellow margin. 



B. Bottlt-shaged, not convolute. 

 601. V.lacteum, Qv*!, gun, pellucid, smooth, with 

 milky veins. 



