482 Description of a 



XLII. — Description of a New Species of Mollusca of the 



Genus V^ENcs. 



Bt Temple Prime. 

 Eead February IT, 1862. 



Tehus (CJeniiea) Manhattensis, nov. sp. 



Jay's Cat. iv. ed. Suppl., p. 465—1852. 



T, parva, triangulari, subsequilaterali, nitid^, 

 transversim striata ; sulcis distantibus ; marginibus 

 crenulatis. 



Shell small, triangular, nearly equilateral ; 

 i)eaks somewhat raised, generally eroded ; 

 valves moderately compressed, within white ; 

 exterior shining, white, strise somewdiat 



Magnified nine times. *=' ' 



coarse and distant, thongli regular ; teeth 

 divergent, strong, distinct; muscular and palleal impressions 

 very distinct ; sinus small, acute ; inner margin crenulated. 

 Long. \ ; lat. ■g-'r ; diam. ^l inches. 



" 3; " 2i; " li milh 

 •': ''•::; 2'^ 



Hob. — The State of I^ew York, in the East River, and at 

 Green port, L. I. 



(Cabinets of Jay, Gould, Sanderson Smith, and Prime.) 



I dredged half a dozen specimens of this species in 1852 at 

 Hell Gate, between Mill Rock and the month of the Harlem 

 river, and having submitted them to Mr, Stimpson, who pro- 

 nounced them distinct from the Venus gemma Totten, I disti-i- 

 buted them as a new species. Since this time Mr. Sanderson 

 Smith has found it at Greenport in more abundance and in 

 company with the Y. gemma. 



Comparing this species with the Y. gemma, I find that it is 

 smaller, more triangular, less full, less elongated ; its uniform. 



