JVotes on Species of Corbiculadce. 



61 



posterior side is somewhat attenuated. The beaks are full, 

 though not much raised, they curve inwardly, and are approx- 

 imate. The valves are solid. The hinge is strong though not 

 broad, and forms an obtuse angle. The interior is pale violet, 

 which becomes more intense on the margins and the muscular 

 impressions. The sulci are not much raised, and are regular 

 until they reach the centre of the discs, then becoming more 

 and more irregular as they approach the inferior margin. The 

 epidermis is a little polished and of a soiled greenish color. The 

 lunula is quite distinct. 



Comparing this species with Corbicula fluminea* we find 

 that it is smaller, less inflated, less solid, more transverse, the 

 beaks are less full and not so much raised, the hinge also is 

 narrower and not so strong; the sulci and the general coloring 

 are different. 



The only specimens of this species I have met with are those 

 in my cabinet. I have every reason for assigning China as the 

 place where this species is found. 



5. Corbicula liitea, Morelet. 



Cubicula lutea, Morelet. Rev. Zool. 481. 1862. 

 C. testa ovato-subtrigona, transversa, inaeqnilaterali, tumidula, tenui ; 

 latere antico rotundato, postico atte- 

 nnato; ligamento modico ; umbonibus 

 parvulis, acutiusculis, incurvis, viola- 

 ceis ; sulcis fere obsoletis ; cardine an- 

 gustissimo; dentibus minutis, tenu- 

 ibus ; epiderraide flaveo-lutescente 

 macuiisque cinereis plus minusve no- 

 tata, ad margines nitente, vestita ; 

 margarita albido-lilacina. 



Long. 43; lat.35; diam. 22 mill. 



Hob. — China. Collect. More- 

 let et Prime. Corbicula lutea. 



The shell is transverse, oval-subtrigonal, inequilateral, deli- 



See Fig. 4, page 60. 



