163 WORMS. TESTACEA. 52. Bulla. 



52, BULLA, : 



343. B. lignaria. Obovdte, thin, yejiowish-brown, with 

 numerous pale transverse striae ; the crown narrower 

 and slightly umbilicate. 



Br. Zoel. t. fro./. 83. Donovan t. '27. Da Costa t. 1. /. 9. 

 Shell nearly. 2 inches long, with a very large aperture which is 

 contracted at top, white within : pillar flexuous and visible up 

 to 'the crown. • 



344. B. Ampulla. Oblong-oyal, smooth, glossy, whitish 

 .mottled and varied with light-brown; the crown 

 narrower and slightly umbilicate. 



Montdgne Brit. Shell, p. eo6. tab. 7,/. 1. 



Shetl hardly half an inch long, with a wide aperture at bottom T 

 pillar not visible to the end: spire none. 



345. B. patula. Oblong, glossy white, smooth, length- 

 ened at each end into a canal, slightly umbilicate 



\ at top; m 

 Br. Z00l.tab.70. /. 85.- A* Donov* ft t^i.descrip. t. 143. 



Shell about an inch long? involute, the aperture narrower to* 

 wards the top, produced at both ends, one end more elongated, 

 with, aflat margin: : pillar twisted. 



j46. B. ap'erta. Suborbicular, pellucid, white, faintly 

 ... striate, almost, entirely open. 



Do'hovan t. 1.20. f*\. Da Costa lab. 2./. 3. - ■ 



Shell about half an inch long thin, brittle: pillar small* 

 slightly involute^ visible to the end* 



347. B. Ilaliotoidea. . Suhoval, pellucid, white, slightly 

 striate; the aperture closed at the top where it is 

 twisted sideways into 2 whorls. 



Montague t. 7^/. 6. . Vign. z.-f.'G. 



Shell 3 quarters of an inch long, half an inch broad> thin, very 

 open but closed and twisted obliquely at the top. 



348. B^ Plumula. Ovate-oblong, depressed, pellucid, 

 yellowish-white, concentrically wrinkled, almost en- 

 tirely open, rounded and convolute with a single 

 turn. at top. 



Montague tab. 15. f. 9. Vign* 2. /. . 5. 



Shell half an inch long, a quarter broad, and nearly as broad at 

 top, tinged with brown at one end, Wrinkled Within, open over 

 the whole shell : pillar-lip slightly turned in. 



3-49. B. Catena. Ovate, white, pellucid, transversely 

 striate, almost -entirelv open, obtuse at top with a 

 single turn. 



Montague t. 7. /. 7, Linn. Trans, v. t. uf. 6—8.? 



Shell minute, with chain-like striae, slightly umbilicate. 



350. B. emarginata. Pellucid, smooth, gibbous, with the 

 aperture emarginate and the lip slightly arched, 



Adams Linn. Trans, v. tab. \.f. 9. jo. 1 1. Minute. 



351. B. denticulala. Oblong, white, pellucid, nearly 

 equal, obtuse, smooth; the aperture at top ending 

 in a very acute tooth. 



Adam's Linn. Trans, v.. tab. 1./. 3.4. 5. Minute. 



352. B. Hydatis. Oval, brittle, subpejlucid, tumid, 



