246 THE CHICAGO ACADEMY OF SCIENCES. 
LOESS. 
Iowa: Des Moines, Polk Co. (McGee and Call; Van Hyning; Walker) ; 
Turkey Creek, Johnson Co.; common in Leess with humilis (modicella) and 
caperata (Shimek) ; Loess of Iowa (Todd). 
GENERAL PLEISTOCENE. 
Cororapo: South Platte River, Arapahoe Co. (Henderson). 
Inuinois: Tazewell shore, Illinois River, Tazewell Co. (Wolf). 
Recently Mr. Junius Henderson sent the writer a specimen of a 
small Lymnza which seems to be a form of parva. It has a pointed 
spire, well-rounded whorls, deep sutures, a well-marked umbilicus, a 
long ovate aperture and the inner lip erect. The last whorl is much 
contracted, but this may be a malformation. It measures as follows: 
Length. Width. Aperture length. Width. 
5.50 3.00 2.00 1.25 mill. 


Geological —|" 
Distribution. } 
@ Loess © 
MPost-Glacial 





“T am sending you for examination a specimen of a small species 
of Limnza of the identity of which I am not certain. I found two 
er three, but the material when freshly exposed was very fragile and 
this seems to be the only one which arrived home in recognizable 
condition. This shell is interesting to me and may be to you in your 
work on the Limneas, because it was found in what I at present con- 
sider Pleistocene deposits containing in the same horizon the following: 
This form of Lymnza was found in deposits supposed to be Pleis- 
tocene, which are thus described by Mr. Henderson: 
