58 



JS^otes on Species of Corbiculadoe. 



brownish-olive color and polished, and has, besides occasional 

 markings of black or brown, fine rajs of a lighter shade running 

 from the beaks to the inferior margin. The lunula is not dis- 

 tinct. 



Compared with Corbicula JPrimeana, Morelet, this species is 

 lighter in texture, more inequilateral, the posterior side is more 

 produced, the beaks are fuller, the hinge is less robust, and the 

 general coloring is not the same. 



Fig. 2. 



2. Corbicula Priineana, Morelet. 



Cyrena (Batissa) Primeii, Morelet (non Morch). Rev. Zool. 480. 1862. 



C. testa transversim ovata, suba?quilaterali ; lateribns rotnndata, solida, 

 nitida, sulcis numerosis et tenuibus regulariter coe- 

 lata ; epidermide viridi lutescente, ad umbones fus- 

 cescente induta, maculisqne paucis fusculis obscure 

 notata ; umbones obtusi, erosi, apice violaceo ma- 

 culati, antice vix proni ; liganientum tumidum, 

 promiiiens, terminale ; margarita livido-violacea. 



Long. 32 ; lat. 25 ; diam. 16 mill. 



Hah. — In flumine Che Fou, Chinae Sep- 

 tentrionalis. Collect. Morelet et Prime. 



The shell is transversely-oval, equilateral, 

 and somewhat solid. The anterior side is 

 rounded. The beaks are moderately full, 



Corbicula Primeana. though not mRch raiged> The i nter ior is of a 



brilliant violet color. The cavity of the valves is not deep. 

 The hinge is broad and robust. The sulci are numerous, close, 

 regular, raised, and sharp. The epidermis is greenish, with 

 occasional spots of a darker color. 



Somewhat allied to Corbicula JHulleriana, but larger, pro- 

 portionately less robust, the beaks are more inflated, the margin 

 above the anterior lateral tooth is less rounded, and the sulci 

 are closer and more numerous. 



