JULY, 1906. 
NOTES ON WISCONSIN MOLLUSCA. 
87 
Co. "Wisconsin," F. C. Baker, Naut, XIV, 16; Moll. Chic. 
Area, p. 316. In the older citations, this form was commonly 
confused with P. heterostropha, which it largely replaces in the 
Milwaukee region. 
63. Aplexa hypnorum Linne. 
Menomonee valley, near old cattle chute ; pools in Johnson's 
woods. Kenosha, Mrs. Wiswall's list. Over-flow pond of the 
Milwaukee river at Lindwurm, large numbers, C. E. Brown, 1903. 
"Milwaukee, Wis., I. A. Lapham," Smith. Misc. Coll., VII, 101. 
B. OPERCULATE. 
64. Pleurocera subulare Lea. 
var. pallidum? Lea. 
North shore of Lake Wninebago west of High Cliff, Calumet 
Co. Mr. Baker provisionally identified the specimens as pertain- 
ing to the above variety. They are of a light horn yellow color, 
the earlier whorls with several incised revolving lines and a faint 
median carina. 
65. Pleurocera elevatum Say. 
Milwaukee river at Lindwurm and below the Schlitz icehouse, 
the latter representing the form tr actum, Anthony. Also from the 
Menomonee river dredgings. 
66. Goniobasis livescens Menke. 
Lake Michigan, at the pumping stations and Lake Park ; Mil- 
waukee river at Lindwurm and near Coney Island; doubtfully 
from the Kinnickinnic river, near Eleventh avenue ; Menomonee 
river dredgings. 2816, Milwaukee river. Kenosha, Mrs. Wis- 
wall's list. The specimens from the lake shore are frequently 
more or less battered, often with a perforation in the body whorl. 
Goniobasis livescens depygis Say. 
"Wisconsin (Af. occulta Anthony)/' Smith. Misc. Coll., XVI, 
248. Walker, Naut., XVI, 35, suggests that this is a good species. 
It did not occur in our collections. 
