331 



Guppy Rbprint 



Page go 



73 



PAPER No. 6 



ON NEW SPECIES OF BIVAL VE MO EL USKA FOUND 

 AT CUM AN A, VENEZUELA. 

 Paper presented to the Scientific Association of Trinidad, 

 Dec. io, 1873 and published in vol. 2 of the "Proceedings," 

 pp. 90-2, with plate 3. 



One of the shells now to be described is a large and fine 

 species of Venus. Specimens of this have been in my cabi- 

 net more than four years ; but although it appeared to me 

 unlikely that so large and handsome a shell should have 

 escaped notice, yet I have not been able to find anything 

 published relating to it. The species is certainly allied to 

 V. cancellata, but by no means very closely. Its square 

 equidistant ribs are not unlike those of V. rugosa, and the 

 shape and color may recall V. gallinula, but it must be 

 admitted that these resemblances are somewhat illusory. 



The other shell is a Mactra, not belonging to the typical 

 group of that genus, but on the contrary, somewhat of an 

 aberrant form. It is a large and interesting species. 



The recent not less than the fossil shell fauna of Cumana 



