338 



THE CHICAGO ACADEMY OF SCIENCES. 



GEOLOGICAL RANGE (Figure 38) : Pleistocene. Rcflexa ranges 

 through a number of Pleistocene deposits within its present distri- 

 bution, but has not been found fossil as far north, east or south as 

 it now ranges. Kennedy's record 1 from the Brazos River valley, Rob- 

 ertson County, Texas, needs confirmation, as rcflc.va has not been 

 authentically reported south of Illinois. 



RECORDS. 



LCESS. 



ILLINOIS : Base of Loess in bluff of mill creek, about five miles south of 

 Milan, Rock Island Co. (Leverett; Shimek; Udden). 



' 



Distribution of 

 GALBA REFLEXA \ 



80 



iff 



FIG. 37. 



IOWA : Bluffs bordering the Missouri River in the counties of Fremont 

 and Mills (Call). 



MARL DEPOSITS. 



ILLINOIS: Clyde Avenue, near Austin Avenue, Chicago, Cook Co. (Scharf). 

 MICHIGAN : Cut between section 24 and 25, Spaulding Township, Saginaw 

 Co. (A. C. Lane^ 



WISCONSIN: Milwaukee, Milwaukee Co. (Baker; Slocum). 



CLAY DEPOSITS. 



ILLINOIS: Le Barnes' clay pit, South Evanston, Cook Co. (Walcott). 

 *An. Rep. Geol. Surv. Texas, IV, p. 66; p. 313, 1893. 



