FeS 
THE NAUTILUS. 3 
been prepared in advance of the formal report of the summer’s 
work. 
Owing to the sandy nature of the soil, so characteristic of that 
portion of the State, and the long-continued drought which pre- 
vailed during last summer, terrestrial mollusks were not so numer- 
ous, either in species or individuals, as might naturally have been ex- 
pected. The characteristic feature was the occurrence of many spe- 
cies, especially of the Zonitidae, peculiar to the northern region. Thus 
Zonites ferreus Mse., binneyanus Mse., and exiguus Stimp., Vitrina 
limpida Ged., and Helix harpa Say, are not found in the southern 
part of the State. Patula asteriseus Mse. and Strobilops virgo Pils., 
also northern forms, were interesting additions to our fauna. The 
local and rare (in this State) Helix sayii Binn., an essentially north- 
ern form, also occurred, indicating its probable range across the north- 
ern part of the State, as all the examples heretofore known to the 
writer have been from the counties bordering on Lake Huron. A 
few specimens of the albino variety of Patula alternata Say, were 
found associating with the typical form. Two forms of Helix albo- 
labris Say were noted, occurring side by side, the one quite typical 
in shape and color, but rather below the average size and with a 
very thick and broadly-reflected lip ; the other larger and much in- 
flated, with a thin, dark purplish brown shell, having the narrowly 
reflected lip more or less deeply tinged with purple; a very beauti- 
ful form, not seen elsewhere. The only Pupa found was P. con- 
tracta Say, while Vertigo was represented by four forms, V. ovata 
Say, bollesiana Mse., ventricosa elatior Sterki, and pentodon Say. 
In addition to the universally-distributed Succinea obliqua Say and, 
avava Say, was found the elongated form of S. ovalis Gld., com- 
mon in the northern part of the State, which has been doubtfully 
referred to the S. higginsi Bld. (see Naurrius, VII, p. 127). In 
all, thirty-one species of land-snails were found, of which two were 
new to the fauna of the State. 
Among the fresh-water pulmonates, many interested forms oc- 
curred. The most noteworthy of them was a single example of a 
deep water form of Limnea stagnalis L., dredged from ten metres 
depth in Lake Michigan, at High Island Harbor in the Beaver 
Islands. It is about 23 mm. in length, exceedingly fragile, of a pure 
translucent white, and, though somewhat larger and differently pro- 
portioned, appears to be analogous to the var. Bottnica of Clessin 
from Sweden. At the same locality occured a small globose form 
