Notes on Species of CorbiculadcB. 



229 



In conclusion I will add that the Corbicula Woodiana does 

 not seem to be very closely allied to any of its congeners ; on 

 the contrary, its size and general external appearance bring it 

 into very close proximity with certain species of Cyrena. 



Genus BATISSA. 

 2. Batissa similis, Prime. 



Batissa similis, Prime. Annals N. T. Lyceum Nat. Hist., vol. vii. 112. 1859. 

 Prime Cat. 5. 1863. 



B. testa maxima obovata, insequilaterali, solida, compressiuscula ; 



Fig. 60. 



Batissa similis. 



latere antico brcvi r rotundato, postico latiore; umbonibus obliquia 



APRIL, 1866. 18 Ann. Ltc. Nat. Hist. Vol. VIII. 



