482 BULLA. 



soluta. 22. Shell sub-cylindrical, transversely 

 striated, with the outer whirl detached ; apex 

 truncated and channelled. 



Bulla soluta. Chemnitz, x. p. 123. t. 146. f. 1359 to 1361. 



Gmelin, p. 3434. 

 Bulla Ceylonica. Bruguiere Erie. Metk. p. 377- 



Inhabits Ceylon. Chemnitz. 



Shell rather more than an inch and a half long, and ten lines 

 broad. It appears, from Chemnitz's description, to be very 

 nearly allied to B. Akera, and to differ principally in being 

 more cylindrical, much larger, and more distinctly striated. 



akera. 23. Shell ovate, with the outer whirl de- 

 tached ; apex truncated and channelled. 



Bulla Akera. Gmelin, p. 3434. K&mmerer Cab. Ru- 

 dolstadt, p. 127. t.3. f. 1 to 3. Montagu Test. p. 219- 

 Maton and Rackety in Lin. Trans, viii. p. 125. Dor- 

 set Cat. p. 43. t. 22. f. 12. 

 Bulla soluta parva. Chemnitz, x. p. 122. 1. 146. f. 1358, 



No. 1 to 3. 

 Bulla soluta. Ulysses's Travels, p. 455. 

 Bulla Norwegica. Bruguiere Enc. Meth. p. 377. 

 Bulla resiliens. Donovan, iii. t. 79- 



Akera bullata. Mutter Zool. Dan. ii. p. 88. t. 71. f. 1 to 5. 

 Inhabits the coasts of Norway. Mutter. Bay of Tarentum. 



Ulysses. Great Britain. Donovan, fyc. 

 Shell about three quarters of an inch long, and rather less than 

 half an inch broad ; thin, pellucid, horn-coloured, somewhat 

 wrinkled longitudinally, and appearing minutely striated when 

 magnified. The lip is extremely thin, and the external vo- 

 lution is unconnected at its extremities with the inner whirls; 

 the aperture is large at the base, but contracts towards the 

 apex, which is truncated, convoluted, and channelled, with 

 the whole columella visible. 

 Muller, in the Zoologia Danica, t. 71. f. 6 to 9, has figured 

 another species allied to B. Akera, but has not given any 

 description, and the figures are copied in the Encyclopedic 

 Methodique, t. 360. f. 4. a, b, c. 



physis. 24. Shell rounded, very smooth, pellu- 

 cid, with waved transverse stripes ; spire re- 

 tuse. 



