PAPERS ON ZOOLOGY 169 
Vermilion Co. In small streams and ponded waters, in hoof 
prints of cattle, marshy areas, etc., on aquatic vegetation, 
debris of all sorts, crawling on muddy bottoms, etc. Endures 
much dessication. Associated usually with other Planorbine. 
Superfamily Akteophila 
Family Auriculide 
GENUS CARYCHIUM Muller, 1774 
73. OC. exile H. C. Lea—White Heath, Piatt Co., Brownfield 
Woods, Champaign Co., Hillery, Vermilion Co. Almost amphib- 
ious; very abundant in wet places under logs and pieces of 
wood, in wet moss, and quite often in standing water under 
logs. At Hillery it is the dominant mollusk of the swampy 
lowlands. Gregarious; on one occasion over a hundred speci- 
mens were taken from a log two feet long and about a foot in 
diameter. Its movements are slow and erratic, the long shell 
seemingly too heavy for the animal; it is carried at an angle of 
about 55°. This species usually occurs alone, but at times the 
following snails are its companions: Gastrocopta contracta 
and tappaniana, Agriolomax campestris, Vitrea hammonis and 
indentata, and Zonitoides arboreus. Of these, the most com- 
mon companion is G. Contracta. In very wet places it is 
associated with the smaller species of Lymnaea. No specimens 
of C. exiguum were found, although Baker (’02, p. 256) states 
the two species are almost always found together. Almost a 
thousand specimen of Carychium were examined. 
Suborder Stylommatophora 
Monotremata 
Vasopulmonata 
Orthurethra 
Family Valloniide 
GENUS VALLONIA Risso, 1826 
74. V. pulchella Muller Monticello, Piatt Co., Urbana, 
Champaign Co., Danville, Vermilion Co. This is a species of 
the open prairie, and is plentiful under logs in open lots. I 
have never found it in the deep woods. No other species of 
Vallonia was found although a very careful search was made. 
Family Pupidae 
a ee ee a eee eee 
