The Lcess and its Fossils. 



91 



Nebraska, and Fremont and Pottawattamie counties, Iowa. 

 Tiiese resemble average recent specimens from Iowa and 

 Nebraska. 



Zonites shimekii>^ Pilsbry. This was reported as Z. Jima- 

 tulus, Ward, though the propriety of considering it a distinct 

 species was suggested by the writer in No. i. Vol. I, p. 62 of 

 this series. It certainly is not true Z. limatulus and should 

 be stricken from the lists in the former article (pp. 210 and 

 214) in which comparisons are made with recent shells. 



Additional specimens were collected in Otoe county, Ne- 

 braska, and Fremont county, Iowa. 



Patula alto'uata, (Say) Binn. Specimens from Sarpy and 

 Douglas counties Nebraska, fully equal recent average spec- 

 mens from Iowa and Nebraska.' 



Merodon multilincata, (Say) Try. Additional specimens of 

 the small form were collected in Otoe county, Nebraska, and 

 Pottawattamie county, Iowa. Specimens quite equalling 

 average recent Iowa and Nebraska shells were collected in 

 Sarpy and Douglas counties, Nebraska, and Pottawattamie 

 county, Iowa. This increases the average size of the fossils 

 so much that this species, as well as the foregoing, should be 

 stricken from the list at the bottom of page 213 in the former 

 article. 



It will be observed that this additional evidence indicates 

 even a less depauperate condition of the shells than was sug- 

 gested in the former article. 



In addition to these the following additional species, not 

 reported in the former article, were collected : 



Stenotrema hirsiUnm^ (Say) Try. These are smaller than 

 average recent specimens, but are precisely like recent speci- 



1 For the description of this species see The Nautilus, Vol. IV., No. i, May 

 1890. 



2 Special care was exercised in this, as in all other cases, that bleached 

 modern shells should not be taken for fossils. The vast majority of the fossils 

 in the writer's collection were obtained by digging into undisturbed Loess. 



