WORMS. TESTACEA. 64. Vermiculura. 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 Brit, Shells- p 497. tab. 14. f. 10. 



Shtll 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 haying the margin of the aperture not contracted. 



j95. D. glabrum. Glossy-white, cylindrical, curved, 

 quite smooth, closed rounded and slightly margined 

 at one end. 



Mfintague Brit. Shells p. 497. n. 6. 



M<r//hardly a line long, equal in size its whole length, without 

 striae or wrinkles : aperture orbicular. . 



61. VERMICULUM. 



A. More or less convolute. 



596. V. incurvatum. Whife, semitransparent, straight, 

 with 3 close whorls at the smaller end. 



Walker minute Shelhf. 11. Adams Microsc. t. \\.f. 7. 



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

 Walker Minute Shells/. 12. Montague p. 518. S. per v him. 



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

 quite fmooth, cylindrical, without fyphon or internal chambers. 



597. V. bicorne. White, opake, semilunar, inflated in 

 the middle. 



Walker minute Shells /. 2. 3. Adams Microsc. t. \\.f. 2. 3. 

 Shell a line long, tapering to each end. 



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

 pressed, with 3 or 4 whorls. 



Walker Minute Shells/, i. Linn. Trans, v. t. i./. aff-ao. 



,S/ie//the tenth of an inch wide, with the whorls more pr lefs 

 orbicular or oval : aperture compressed, fcmilunar. 



599. V. subrotundum. White, opake, suhorbicular, subr 

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

 the upper-side. 



Walker minute Shells f, 4. Montague p. 521. . 6. 



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

 others on the upper-side, and not visible beneath: aperture angular, 

 with a yellow margin. 



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

 suh-compressed, with a single longitudinal suture on. 

 one side. 



Montague Brit. Shells p. 522. tab. 14. f. g. 



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, Bottle-shaped, not convolute. 



601. V.-iactewn. . Oval, tkin r pellucid, smooth, with 

 milky veins; 



