970 Mollusca of Middlebury, Vt. and Vicinity. 
: : 
P. elevatus, nob.» This species does not differ much from 
some varieties of the preceding, and perhaps may not prove enti- 
tled to rank as a species. All the specimens which I have seen, 
however, present that constancy of difference which is most im- 
portant in distinguishing species. One or two specimens have 
been found in a swamp at Ticonderoga, N. Y. 
_ P. hirsutus, Gould. This species, common in the vicinity of 
Boston, is rare in this region. It is found in company with P. 
exacutus. 
P. deflectus, Say. A very few specimens have been found, in 
company with Valvata sincera. 
SuccINEA. 
S. obliqua, Say. This species is frequently confounded, as 
perhaps it should be, with S. campestris, Say. In the Western 
States this shell is of a pale horn color, but in this vicinity it is 
of a deep shade of amber. It is common in low grounds under 
stones and wood. On the Brothers’ Islands, opposite Burlington, 
Prof. Benedict has found very large specimens, one of which in 
my cabinet is .97 in. long, and .55in. wide. ‘The animal is more 
or less thickly mottled with dark purple. In October a thin trans- 
parent epiphragm is formed. | 
S. ovalis, Say. This very fragile species is found only very 
near water. In low ground, which is covered with a species of 
flag, and overflowed by Lake Champlain in the early part of 
summer, I have seen them in immense numbers on the upper 
part of the flags. . putris of Europe is intermediate in form 
between this and the preceding species. 
S. avara, Say. This species is the young of S. vermeta, Say. 
At this age a viscid substance attaches dirt to the shell, which 
becomes clean in a mature state. As the young was first de- 
scribed, the name of the adult must be rejected. This species is 
found in the same station with S. obliqua, and in this region Is 
rather rare. 
Buuimvs. 
B. lubricus, Drap. This species is remarkable for its exte0- 
sive geographical distribution, being dispersed over a large part of 
Europe. It is rather common in this-vicinity, has been found in 
great abundance near Boston by Dr. Gould, and was seen near 
Lake Winnipeck and the Lake of the Woods by Say. With 
equal propriety the species has been referred to Achatina, but as 
