. — ee « li. ee : e \e ; 
son , Mollusea of Middlebury, Vt. and Vicinity. Q75 
‘am not.aware that it has since been found, until _the summer of 
1839, when on an excursion to Rogers’ Rock, near the NW B. ex- 
tremity of Lake George, N. Y., I found a number of individuals 
crawling among moist leaves. On a visit to the same place, last 
autumn, avery few only were found. These specimens were 
obtained in a niche in the rock, accessible only by water, within 
the space of less than a square rod. A careful search in the 
neighborhood enabled me to detect only one dead specimen, at 
a distance of ten rods from the little colony. 
Although I have not seen specimens of the European shell, I 
do not doubt that this is the same species, which is figured and 
described by numerous authors. It differs only in being entirely 
destitute of the tinge of green, which is mentioned by some of 
them. It is perfectly hyaline, and for elegance of contour and 
delicacy of aspect, cannot be surpassed. 
: ANcYLUs. 
A. parallelus, Hald., Mss. This species has been supposed 
tobe Say’s A. rivularis, with the brief description of which it 
agrees very well. But my friend 8. S. Haldeman, Esq. informs 
me that it is distinct. *It is rather common in Otter Creek, and 
in a pond in the east part of Brandon. — 
A. tardus, Say. Found rather plentifully in a brook in the 
east part of this town. Mr. Prescott has also found it in the 
_ southern part of this State. 
Two species of naked Mollusca, of the family Pulmonea ter- 
restria, Cuv., are found in this region, which have a dense shield- 
like mantle, covering the whole back, the branchial orifice on the 
tight side near the head, and the anus at the posterior extremity. 
As the latter orifice does not communicate with the branchial 
cavity, which is immediately behind the head, these species can- 
hot belong to the genus Vacinutus, F'er., to which I had at first 
teferred them on account of the extent of the shield-like mantle. 
Not having the means here of ascertaining whether any genus has 
been described for their reception, I am obliged to leave them. 
One species is (after being preserved in spirit) 12 inches long and 
+ inch in diameter. The mantle is thickly mottled with a gray- 
ish black, and the spots on the back are sometimes confluent. 
The other species (also in spirit) is about 4 inch long and inch 
in diameter, and is of a nearly uniform blackish gray color. This 
