464 Mr. W.H. Benson’s Conchological Notices. 
at the centre of the extremity, the lobes rounded. Mantle free, and 
branchial cavity open. Foot with a spiral horny operculum angular at 
the upper part. 
~~ ‘The specimens varied infinitely in colour, and were for the most part 
banded with red, white, and glaucous. 
I met with a few specimens on the Ghauts at Calcutta, sixteen miles 
lower down the river. 
I preserved specimens alive in a glass replenished occasionally with 
fresh or sea water, until April, 1833, when we had passed St. Helena. 
The strong ones crawled out of the water, and adhered to the glass above 
the margin of the liquid, 
Genus Novacutina, Bens. 
I was much pleased during a recent visit to Dublin, at meeting with 
a second species of the genus Wovaculina, founded by me in the Glean- 
ings in Science of Calcutta, (No. 14, for February, 1830,) on a single 
species Wov. Gangetica, met with in the several rivers of the Gangetic 
tract, and especially interesting as a Solenaceons genus inhabiting fresh 
water. The species in question I procured from Mr. Glennon of Suffolk 
Street, who informed me that it had been recently brought from Indiana, 
U.S. In its generic character it agrees with the Asiatic shell to which 
it is superior in size. It differs specifically in the following instances. 
The posterior or syphonal and ligamental side is the shorter, and the 
teeth are situated on the longer side of the shell; while in the Asiatic 
species the syphonal and ligamental side is the longer, and the teeth are 
on the shorter side. The callus which borders the ligamental canal is 
also much thicker, comparatively, in the American species, having to 
support a very strong ligament. My specimen has two teeth in each 
valve, and the syphonal scar is equally long with that of Wov. Gangetica. 
The remains of the epidermis on the edge of the shell shew that, in this 
species also, it projects beyond the basal and cardinal edges. 
Genus ScapHuLA, Bens, 
My first specimens were found in the rainy reason of 1826 in the bed 
