CORBICULA. 



America. 



/I. CORBICULA LIMOSA, Deshayes. 



Smithson. Monogr. 



a. Rivers of Eastern Uruguay. 



b Cyclas variegata, d 1 Orbigny. Rivers of Eastern Uruguay. 

 (Ex auctore, fide Cuming.) 



c. Corbicula semisulcata, Deshayes. South America. (Ex 



auctore.) 



d. Corbicula perplexa> Prime. South America. 



2. CORBICULA CUNEATA, Jonas. 



Smithson. Monogr. 

 Orinocco river. (Ex auctore.) 



3. CORBICULA CONVEXA, Deshayes. 



Smithson. Monogr. 

 Mazatlan. (Ex auctore.) 



