JULY, 1906. 
NOTES ON WISCONSIN MOLLUSCA. 
Somatogyrus integer depressus Tryon. 
Kenosha, Mrs. Wiswall's list. 
72. Pomatiopsis lapidaria Say. 
Castalia Park, Wauwatosa. 2788, near cement mills, Mil- 
waukee Co., Wis., W. M. Wheeler. Kenosha, Mrs. Wiswall's 
list. "Richland Citv, Wis.," in pencil in library copy of Smith. 
Misc. Coll., VII, 93/ 
Pomatiopsis lustrica Say (= p. lapidaria). 
"Four Lakes, Wis., I. A. Lapham," Smith. Misc. Coll., VII, 95. 
See Baker, Moll. Chic. Area, pp. 334, 344. 
73. Valvata tricarinata Say. 
Milwaukee river below Schlitz icehouse; Mud Creek, at and 
east of North Milwaukee ; Honey Creek, near Layton Park ; Cold 
Spring Park (fossil) ; Lake Winnebago, near High Cliff, Calumet 
Co. "Milwaukee, Wis., I. A. Lapham," Smith. Misc. Coll., 
VII, 12. 
73a. Valvata tricarinata simplex Gould. 
Shore of Lake Michigan, north from flushing tunnel pumping 
station. 
Valvata bicarinata Say 
form normalis Walker. 
Specimens from Mud Creek at North Milwaukee having the 
characters supposed to distinguish this form are probably merely 
the young of V. tricarinata. 
74. Valvata sincera Say. 
Honey Creek, near Layton Park ; fossil at Cold Spring Park. 
12658, Cold Spring avenue (fossil). "Madison, Wis., I. A. 
Lapham," Smith. Misc. Coll., VII, 13. 
75. Vivipara contectoides W. G. Binney. 
Kinnickinnic river, near Eleventh avenue, one dead shell only. 
As this may have been brought on a boat, further evidence is 
needed before fully admitting the species to the Wisconsin fauna. 
It is well established at Chicago. For the history of its coloniza- 
tion in northern waters, see Amer. Jour. Conch., IV., 245 ; 
Nautilus, V, 133. 
