MUSEUM OF COMPARATIVE ZOOLOGY. 263 



is certainly nearer Astarte than it is to Meretrix, deduction being made of 

 heterogeneous species. I have therefore, awaiting further information, followed 

 the acute and accurate Woodward in referring Circe and its subdivisions to the 

 Astartidce, where they seem to me more at home than in the position assigned 

 them by the learned French malacologist. 



Gouldia cerina C. B. Adams. 



(Jotddia cerina C. B. Adams, Dall, Bull. M. C. Z, IX. p. 130, 1881. 



Plate VII. Figs. 4a,4li. 



Habitat. Charlotte Harbor, Florida, 13 fms.; Barbados, 100 fms.; Station 5, 

 229 fms. U. S. Fish Commission at various depths northward to Hatteras, 

 abundantly. 



Gouldia (Circe) bermudensis E. A. Smith is more globose, the hinge is differ- 

 ent, and the lunule shorter, but the sculpture is essentially the same in both, at 

 least so far as reticulation is concerned. C. cerina is variable, and some speci- 

 mens are faintly and others very strongly reticulated. C bermudensis is very 

 much like C. metastriata Conrad, a tertiary fossil. 



Family UNGULINID^. 



Genus DIPLODONTA Bronn. 



Diplodonta venezuelensis Dunker. 



Dlplodonta venezuelensis Dunker, Dall, Bull. M. C. Z., IX. p. 136, 1881. 



Habitat. Yucatan Strait, 640 fms., one valve and fragments ; Sigsbee, off 

 Havana, 80 fms. ; West Florida, 19 fms. ; all disunited valves. 



Diplodonta turgida Verrill & Smith. 

 D. turgida Verrill & Smith, Trans. Conn. Acad., V. p. 569, pi. Iviii. fig. 42 (1881). 



Habitat. Station 247, in 170 fms., off Grenada, one fre.sh -valve. 



This differs from the preceding species by its much greater inflation ; the 

 hinge teeth are also much more delicate, longer, and of a somewhat different 

 shape. 



