THE KANSAN ICE INVASION 267 



St. Joseph, Buchanan County. 

 Polygyra albolabris (= Helix rufa) 



Lexington, LaFayette County. 

 Pyramidula alternata Polygyra profunda Galba palustris 



Mouth of Platte River. 



Polygyra multilineata Galba palustris 

 Pyramidula cronkhitei anlhonyi " 5-6 species 



Helicodiscus parallelus Physa heterostropha 

 Vitrea indentata " gyrina 



Vallonia pule hell a ( — minuta) Aplexa hypnorum 



Bifidaria armifera Planorbis trivolvis 



Succinea obliqua Segmentina armigera 



Booneville, Cooper County. 

 Pyramidula cronkhitei anlhonyi Vitrea hammonis ( = electrina) 



Vallonia pulchetta Helicina occulta 



Near St. Louis, St. Louis County. 



Pomatiopsis lapidaria Circinaria concava 



Helicina occulta Pyramidula cronkhitei anlhonyi 



B ifida ria arm if era ( = striate! la) 



Pupa species Polygyra monodon 



Zonitoides arborea " kirsuta 



Vitrea hammonis ( = electrina) Slrobilops labyrinlhica 



The seeds of Litlwspermum are reported from the mouth of the Big Nemaha 

 and five mammals are recorded from various localities, as noted below: 



Castor fiber (=canadensis) Near mouth of Big Nemaha 



Elephas primigenius Bonne Femme Creek, Boone County 



Mammui americanum St. Louis 



Molar of ruminant Near mouth of Big Nemaha 



Incisors of small rodent Near mouth of Big Nemaha 



In the above lists Physa heterostropka ( = plicata) is doubtful and the identi- 

 fication is probably erroneous. It was doubtless founded on some one of the 

 more recently described species, perhaps Physa crandalli. Succinea campestris 

 is strictly a southern species and the specimens upon which the identification 

 was made were probably grosvenori which is common in the loess. The Val- 

 lonia is also probably gracilicosta and not pulchella. 



The Missouri fauna is closely related to the southern region, such species 

 as Polygyra divesta and Helicina orbiculata tropica showing this affinity. The 

 majority of the species, however, extend well to the northward. 



It is possible that the Mastodon (reported as angustidens, but now known 

 to be americanus) recorded by Todd 77 from Pike County, in a creek entering 



77 Trans. Acad. Sci. St. Louis, 111, pp. CXC11-CXC111. 



