Notes on Species of Corbtculadce. 



59 



The specimens I possess of this species, and from which the 

 accompanying figure was taken, were kindly sent to me by the 



original describer. 



Fig. a 



3, Corbicula ITIiilleriana, nov. spec. 



C. testa ovato-transversa, aequi lateral!, solidiuscula, subinflata ; latere 

 anticc- rotundato, postico subobtuso; umbonibus tu- 

 midulis, obtusis, saepius erosis; sulcis distantibus; 

 epidermide squalide-virescente, nitente vestita ; car- 

 dine incrassato; valvis intus pallide violaeeo tinctis ; 

 lunula vix conspicua, 



Long. 25 ; lat. 20 ; diam. 14 mill. 



Ildb. — In flumine Fuh Chan," Chinae. Col- 

 lect. Wheatley et Prime. 



The shell is rounded-oval, equilateral, not 

 much inflated, somewhat solid, the margins 

 are generally rounded, the posterior margin 

 is slightly obtuse. The hinge is broad and ro- 

 bust, and the teeth are strong ; the anterior 

 lateral tooth is a little bent in the vicinity of the muscle. The 

 interior of the valves is pale violet. The beaks are moderately 

 inflated but obtuse, and they are often eroded. The lunula is 

 indistinct. The sulci are distant, in young specimens they are 

 very distinct, regular, much raised, and sharp, in the adult shell 

 they seem at times to become nearly obsolete. The epidermis 

 is polished and varies in color from light green to a dark ferru- 

 ginous brown, the portion of the shell in the immediate vicinity 

 of the beaks is most generally brown or black. 



I am at a loss to understand how this species, which is found 

 quite commonly, should have escaped the notice of concholo- 

 gists ; it has probably been confounded with Corbicula flumi- 

 nea. Compared with that species it is very much smaller, much 

 more transverse, less triangular, less ponderous, and less solid ; 



Corbicula Miillerianru 



