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OVAL. 



*Bengalensis. Zea. Chenu. Blan. x 

 Han. 



An. purpurea. Yalen. 

 An. Chinensis. Rust? 

 Unio verecundus. Gould. 



*locellus. Lea. 



*prunoides. Lea. 



*peculiaris. Lea. 



*evitatus. Lea. 



*pilatus. Lea. 



*CEerulei;s. Lea. Ben. Chenu. Blan. 

 Han. 

 Unio Gerbidoni. Eyd. Blan. 



*inornatus. Lea. 



*parcus. Lea. 



"Wilsonii. Lea. 



*substriatus. Lea. 



*olivarius. Lea. Ben. Chenu. Blan. 3 

 Hem. 



*Nuttallianus. Lea. Blan. 

 *Gabonensis. Rust. 



OVAL. 



*Batavus. Mat. and Ract. Lam. Nils. 

 Pfeif. Rossm. Flem. Stein. Bouch. 



Potier. Dup. Brown. 

 Menlce. Mar. Goupil. 

 Chenu. Fitz. Gras. 

 Siemasc. Gerst. Brot. 



Chem. Schroeter. 



Puton. 

 Desh. 



Waard. 



Grat. 



Ifoq. 



Mtja pictorum. 



Monta. 

 My a ovalis.* Soland. 

 Mya Batava. Wood. Maton. Dill. 

 My sea Batava. Turton. 

 Unio ater. Nils. Ross. Bourg. Mcuj. 

 Unio riparia. Pfeif. Menke. 

 Unio pictorum. Drap., PI. 11, Fig. 3. 

 Uniofusculus. Zeigler. Milhl. Fitz. 

 Unio giblta. Milhl. Pfeif. ' 

 Unio Labacencis. Pfeif. Milhl. 



Schmidt. 

 Unio reniformis. Schmidt. Rossm. 



Potier. 

 Unio fuscus. Zeig. Pfeif. 

 Unio consentaneus. Zeig. Rossm. 



Schmidt. 

 Unio amnions. Zeig. Rossm. Po- 

 tier. Schmidt. Bourg. 

 Unio Carynthiacus. Zeig. Rossm. 



Potier. Schmidt. 

 Unio elecurvatus. Rossm. Potier. 



Schmidt. Bourg. 

 Unio sinualus. Stud. 

 Unio planus. Stud. 

 Unio dilatatus. Stud. 

 Unio Moquinianus. Dup. Merni. 



Rossm. Grat. Moq. 

 Unio atrovirens. Schmidt. 



1 Mr. Blanford says it is a very peculiar variety of marginalis, and on the same page, says it is 

 nearer to corrugatus than to marginalis! Also that it probably is not Indian, but "has better claims to 

 distinction than most of Lea's species." It is very difficult for me to understand how any one, even 

 with a little experience, can confound this species with any other, it is so very different. I doubt if 

 Mr. B. has ever seen the species. It is not from the Ganges, but from Manilla, from whence many speci- 

 mens were brought by Com. Wilkes' Expedition. 



2 The figure by Kiister has teeth, and cannot be an Anodonta. I think it must be the same as 

 Bengalensis. 



' Mr. Blanford doubts if this be not the same with ceeruleus, but they are different without doubt. 

 4 Fide Dillwyn. 



