1858.] Notes on some Indian Freshwater Shells. 321 



to rocks and boughs, being constantly moist for months together 

 and generally with a drop of water pendent from the apex become 

 decollated and covered with a green confervoid coat. 



45.* C. Ignota, n. s. — Teria ghat. Bare, my two specimens at 

 present in Mr. Benson's hands for description, so that the name 

 here given is merely provisional. It is allied to C. cylindrica. 



46. C. Bacillun, B. — Nanclai. Yery rare. A new species but 

 unfit for description, of the type of C. Insignis. 



The freshwater shells may be dismissed in a few words, the most 

 remarkable of them not being found by me. I allude to Scapula 

 celocc, which inhabits some of the streams in Sylhet. 



Paludomus Stephanies, B. and P. Conica, Gray, occur at Teria 

 ghat, the former in immense abundance. 



Ampullaria also reaches a large size at Sylhet, one specimen of 

 A. Glohosa, measuring 3.45 by 3.18, the mouth being 2.41 by 1.40. 



A very heavy Calcutta specimen being only 2.43 by 2.28, and the 

 mouth 1.65 by 1.03. 



A dwarf var. not rare about Calcutta, measures only 1.20 by 1.07. 



Daejiling. 



My present list of Darjiling shells, will, I regret to say, be found 

 very meagre, owing to more than one cause over which I have no 

 control. Since my visit to Darjiling, a large addition to previously 

 known species, was made by Mr. W. Blanford, who has sent his 

 unique specimens to England. Of the others, he has liberally fur- 

 nished me with specimens, some of the most interesting of which 

 I had described for insertion in the present paper, but at the last 

 hour failed to obtain the donor's permission for so doing, the present 

 list therefore embraces only published species, though it is to be 

 hoped Mr. Blanford will himself soon remedy this, and adopt the 

 course which his prohibition has debarred me from. 



CYCLOSTOMIDiB. 



Cijclophorus. 

 C. Himalayanus, P. — Not common. 

 G. Tryulium, B. — Kare. 

 C. Aurora, B. — Common. This shell varies very greatly in size 



