DESCRIPTION. 
141 
genus in Gmelin’s edition ; but is here selected as 
an example of the third, being much more remark- 
ably umbilicate than many which are so denomi- 
nated. 
Fig. 4. C. Moneta. 
Shell margined, knotty, white. 
Lister Conch. Tab. 709. Fig. 59. 
Specimen on the back purplish white, outer lip 
with a row of raised knots, and a single one near 
the anterior part of the inner lip. 
Fig. 5. Bulla Volva. 
Shell birostrate j beaks elongated, acute, and 
striate. 
Lister Conch. Tab. 711. Fig. 63. 
Specimen white with a tinge of pink within, 
thin, subglobular, finely striated transversely ; 
beaks rather bent backwards. 
Inhabits Jamaica. 
Fig. 6. B. Ficus. 
Shell obovate, club-shaped, reticulately striate ; 
beak exserted ; suture of the spire obliterated. 
Lister Conch. Tab. 751. Fig. 46. a. 
