136 BULLETIN OF THE 



Lucina antillarum Reeve. 



Lucina antillarum Reeve, Conch. Icon. Lucina, PI. X. fig. 37, 1850. 

 Lucina pecten Reeve, loc. cit., PI. VII. figs. 34, 35 ; not of Lamarck teste Reeve. 

 a occidentalis Reeve, loc. cit., in errata. 



Charlotte Harbor, Florida, 13 fms.; Sigsbee, off Havana, in 182 and 450 fms. 

 Yucatan Strait, 640 fins. 



Lucina funiculata Reeve. 



Lucina funiculata Reeve, loc. cit., PI. VII. fig. 40, June, 1850. 



Station 2, 805 fins. 



A single young valve was obtained, probably of this species. 



Diplodonta venezuelensis Dcxker. 



Diplodonta venezuelensis Dunker, Zeitschr. fiir Mai., 1848, p. 184 ; Nov. Conch., 

 p. 3, Tab. IV. figs. 7, 8, 9, 1858. 



Yucatan Strait, 640 fms. 



One valve and part of another were obtained. 



Diplodonta pilula n. s. 



Shell small, round, inflated, polished, with concentric sculpture of slightly 

 raised sharpish ridges ; umbos smooth, polished, prominent, inflated ; margins 

 not angulated, forming nearly a perfect circle, teeth indistinct : margin smooth ; 

 epidermis if any thin and translucent. Lon. 2.6 ; alt. -1A\ ; diam. •!.(> mm. 



Station 4:5. 339 6ns., living. 



This little shell resembles a homoeopathic pill as much as anything, and, 

 curiously enough, seems to be mature. The teeth are BO indistinct that 1 t< x 1 

 a slight doubt as to whether it is a Diplodonta or not. 



Cryptodon obesus (?) Varan i 



Fragments of a Cryptodon were obtained in 640 tins., Fucatan Strait, which 

 ome resemblance to C. about Yen-ill. though they do not agree with 

 more northern specimens in all respects. These Cryptodons, however, vary 

 considerably, and when fully compared it is probable that the number of nomi- 

 nal species will be reduced. 



