IOWA ACADEMY OF SCIENCE 
253 
Explanation of Plate II. 
Figure 1. — A bank in cut on interurban railway just south of station at 
Coufals. The lowest 'stratum is a fossiliferous post-Kansan loess; above it, 
marked by the four markers, is Iowan sand, which blends with drift to the 
left; the uppermost stratum is a yellow post-Iowan loess. Neither of the two 
upper strata contain fossils. (From Plate XII, Bull. Lab. Nat. Hist., State 
Univ. of Iowa, Vol. V.) 
