THE KANSAN ICE INVASION 257 



includes many species noted by Shimek from Council Bluffs, with the addition 

 of three not recorded from the latter locality. 



Sphyradium edentulum allicola 

 Galba humilis modiccila 

 " caper ala 



The bones of an elephant and the horn core of Bison latifrons (B. occidentalis, 

 vide Hay) are also reported by Udden from this county, in sect. 28, James 

 Township, T. 76 N, R. 40W, in loess at depth of 14 feet. At Carson, peat and 

 wood are found at the base of the loess, showing that the loess was deposited 

 on the weathered Kansan drift after an interval of time sufficient for the growth 

 of peat and a forest. 



Udden 42 reports a fauna in a terrace of loess-like silt north of Loveland, at 

 the base of the Missouri River bluffs, which should probably be referred to the 

 post-Kansan interval tho the presence of Unios leads to the conclusion that 

 the deposit is not loess. The species listed are as follows : 



Vnio, fragments of heavy-shelled species 



Helicina occulta Bifidaria holzingeri 



Succinea grosvenori Lcucochila faUax 



Helicodiscus parallelus Polygyra leai 



Pvramidula alternata Fragments of a bone 



Todd 43 lists a number of loess fossils from southeastern Iowa which may be 

 referable to the Yarmouth interval. His list is repeated below: 



Eyalina binneyana** Pupa muscorum 



" Julia " blandi 



" lineata " fallax 



Helix alternata " armifera 



" perspectiva Vertigo gouldi" 



" striatella Succinea decant pi u 



" labyrinlhica " lineala 



" monodon " aiara 



" leai " obliqua var. grierii" 



" divesta" Helicina occulta 



" mullilineata Lymnaea parva* 4 



Ciondla subcylindrica Pomatiopsis lapidaria 



Planoibis trhohis 



■ Op. cit., p. 266. 



a Proc. Amer. A.A. Sci., XXVII, p. 235. The older nomenclature is here used. 

 44 These species have not been reported from the loess by later students and the identifi- 

 cations are questionable. 



