REPORT ON THE LAMELLIBRANCHIATA. 



39 



The hinges of the following species are unknown to me, and therefore I have been 

 unable to locate them in any of the proposed sections : — 



Necera crassa, Monterosato. 



tasraanica, Tenison- Woods. 

 pura, Angas. 

 granulata, Dall. 



Nemra jeffreysi, Dall. 

 casta. Hinds. 

 didyma, Hinds. 

 trigona, Hinds. 



Section A. 



Necera patagonica, n. sp. (PI. VHI. figs. 5-55). 



Testa NewrcB wollastonii similis, sed crassior, paulo in?equilateralis, rostro postico 

 longiori et graciliori desinita. 



' Hinge margin with pits for reception of the teeth of the right valve. 



2 These are hardly teeth, but rather elongate, shelf-like processes -nithin the hinge-margin. 



