356 CORBULIDiE. 



Syn. Aloides, Megerle. Agina, Turton. Erodina, 

 Daudin. Pacyodon, Beck. Lentidium, Crist, and Jan. 

 Tomala, Raleta, Gray. 



Ex. C. gibba, Olivi, pi. 95, fig. 3. Shell, C.gibba, fig. 

 3, a, 3, b. 



Twenty species of Corbuhe out of thirty-six are peculiar to 

 the Asiatic region, while twelve are found in the American, 

 two in the Australian, two in the European, and two in that 

 of Africa. The China Seas are very prolific in Corbulce, 

 where they live in mud, or among the debris of sand, mud, 

 and shells which constitutes the floor of these seas; they 

 are usually dredged in from ten to thirty fathoms. The 

 outer shell-layer consists of fusiform cells, the inner layer 

 is homogeneous, and is very slightly adherent to the outer 

 layer. The fossil species C. complanata, Sowerby, forms 

 the genus Corbulomya of Nyst. The sub-genus Azara is 

 composed of estuary species, which live buried in the mud of 

 the banks of South-American rivers. 



Species of Corbula. 



alba, Phil. equivalvis, Phil. 



albuginosa, Hinds. erodina, Lam. 



Barrattiana, C. B. Adams. erythrodon, Lam. 



bicarinata, Soiv. faba, Hinds. 



biradiata, Sow. fasciata, Hinds. 



Blandiaua, C. B. Adams. fragilis, Hinds. 



carnosa, Hinds. fulva, C. B. Adams. 



Catlowse, Reeve. gibba, Olivi. 



Chittyana, G. B. Adams. Kjaeriana, C. B. Adams. 



crassa, Hinds. Knoxiana, C. B. Adams. 



crispa, Hinds. Krebsiana, C. B. Adams. 



cuneata, Hinds. lsevis, Hinds. 



Dietziana, C. B. Adams. raarmorata, Hinds. 



eburnea, Hinds. Mediterranea, Costa. 



