Ce | Sl ei ek” Se 
164 ILLINOIS ACADEMY OF SCIENCE 
43. P. noveboracense Prime—Salt Fork and in a stream of 
the Embarras River drainage, Northwest of Champaign, Cham- 
paign Co., in waters of moderate current, buried in soft mud 
or sand. 
44, P. walkeri Sterki—Salt Fork, Champaign Co., associ- _ 
ated with P. compressum, among roots of plants. 
CLASS GASTROPODA 
SUBCLASS Anisopleura 
Order Prosobranchiata 
Superfamily Taenioglossa 
Family Viviparide 
GENUS CAMPELOMA Rafinesque 
45. ©. rufum Haldeman—Monticello, Piatt Co. Also re- 
ported by Mr. Wm. A. Marsh from the Vermilion River. It 
prefers muddy shores of streams usually not very rapid; bur- 
rows in the mud. ; 
Family Valvatide 
GENUS VALVATA Muller, 1774 
46. V. bicarinata normalis Walker—St. Joseph, Champaign 
Co., on water lilies and on the bottom of slowly moving streams 
or ponded waters, often burrowing itself into the mud or vege- 
table debris. It withstands much dessication. 
Family Amnicolide 
Subfamily Amnicolinz 
GENUS AMNICOLA Gould and Haldeman, 1840 
Subgenus Amnicola s. s. 
47. A.limosa Say var. parva Lea—Crystal Lake, Urbana, 
and Champaign Co. at St. Joseph, in mud and among roots of 
water plants, usually in shallow water where there is but little 
current. 
Subgenus Cincinnatia Pilsbry, 1891 
48. A. cincinnatiensis Lea—Monticello, Piatt Co., Crystal 
Lake and Urbana, Champaign Co., Muncie, Vermilion Co. On 
the surface of muddy bottoms or buried in same; also on 
aquatic plants and about roots; usually near shore. 
Subfamily Pomatiopsinz 
