142 Contributions to Indian Malacology. [No. 2, 
;ank is referred to. The shells inhabiting the Seven Tanks shew a 
considerable difference. The shell is a small, subrotundate, thick 
form, approaching some of the varieties of U. favidens, Bens., and has 
much the appearance of being stunted and distorted, a very common 
occurrence in tanks, and especially in those of Calcutta, probably in 
consequence of their being slightly brackish at times. Two speci- 
mens, agreeing well with Lea’s figures, exist in the Asiatic Society’s 
Museum. A very similar shell inhabits the Nerbudda. 
No. 18.—Unio Suurtierr1anus, Lea. Sina River, India. 
Lea, Jour, Acad. Nat. Sci. Phil, Iil., 302, pl. 27, £. 17. 
The Sina river runs past Ahmednugger in the Deccan. It is an 
affluent of the Bheema, one of the principal feeders of the Kistna. 
This shell has somewhat the form of Unio ceruleus, but is thicker. 
Unfortunately the volume containing the description of this shell does 
not appear to exist in Calcutta, so I cannot tell whether specimens, 
which I possess from the neighbourhood, belong to the type form or 
not. In such extremely variable shells as Unio this is a matter of 
considerable importance. 
No. 14.—Unio Meropasensis v. d. Busch, Province of Merodab in 
Bengal. (!) : 
v. d. Busch. MS. in Kiister, Mart. and Chem., p. 233, pl. 78, fig. 4. 
I give the locality of this ridiculously named species as it is 
quoted in Kiister. The locality is doubtless Moradabad in Rohilcund. 
Kiister gives as a synonym ? U. flavus, Benson, and adds the remark : 
‘Whether this species be Benson’s described U. flavus, I cannot 
ascertain, as I have not access to Benson’s work. The name would be 
ill-selected, as the shell is by no means yellow.” 
Of course Benson’s species thus referred to is U. favidens, of which 
the present appears to be a variety, very close to Mr. Benson’s var. 
trigona. The name Merodabensis is so utter a barbarism, that it will be - 
satisfactory to be rid of it. For the little series of blunders attending 
the description of this type, Dr. v.d. Busch again appears to be 
responsible, 
No. 15.—Unio Sixxrmensis, Lea. Sikkim. 
Lea, Jour. Acad. Nat. Sci. Phil. 2nd Ser, IV. 251, pl. 39, f. 131. 
I have some doubt about the locality assigned to this species. It 
