308 LIFE OF THE PLEISTOCENE 



Bifidaria conlracta Succinea retusa 



Circinaria concava " avara 



Omphalina inornaia x Pomatiopsis lapidaria 



It will be noted that the list of Fuller and Clapp includes a number of species 

 of land shells not recorded by Daniels. These are : 



Succinea lineata ( = grosvenori) Vertigo tridenlala 



Polygyra albolabris Vallonia cyclophorella 



" elevata Galba kumilis rnodicella 



" thyroides 



Succinea lineata is considered a synonym of S. grosvenori (vide Pilsbry* 

 Proc. Phil. Acad., 1906, page 161). Grosvenori is not given in Daniels list, nor 

 is it quoted in any list of Illinois or Indiana fossils. It is a common loess fossil 

 in Iowa and there is no reason why it should not occur in the same deposits in 

 Illinois and Indiana. Its occurrence is paralleled by the presence of Oreohelix 

 iowensis, Pyramidula shimekii and Sphyradium edentulum alticola, species 

 which are now found living westward in a drier climate. 



The list published by Cox, which follows, also contains species not listed by 

 either of the previously mentioned authors. It is possible that in the older list 

 there may be some errors of identification. Cox lists 18 species from New 

 Harmony, 5 of which do not occur in Daniels lits. 107 These are marked with 

 an x. % 



Circinaria concava Polygyra hirsuta 



Zonitoides arborea " monodon 



x Vitrea indentata " fraterna 



Pyramidula perspectiva Vallonia pulchella 



Helicodiscus paraUelus{ — lincatus) Succinea azara 



Bifidaria armifera x " elongata 



x Leucochila fallax Pomatiopsis lapidaria 



Strobilops labyrinthica Helicina occulta 



x Punctum pygmaeum x Vahala tricarinata 



The last species is doubtful, as it is not found in true loess. The Succinea 

 elongata in the above list, as well as in the following list, is probably Say's 

 Physa elongata ( = A plexa hypnorum) as there is no Succinea elongata in America. 



In Sullivan County, along the Wabash River and Busseron Creek, a fossili- 

 ferous loess occurs overlying Illinoian drift. The following species have been 

 identified. 108 



Circinaria concava Helicina occulta 



Polygyra fraterna Succinea elongata? 



" monodon " species 



" hirsuta Bifidaria armifera 



Strobilops labyrinthica Pomatiopsis lapidaria 



Pyramidula perspectiva Helix minuta (= Vallonia pulchella) 



107 Geol. Surv. Ind., 8, 9, 10 An. Rep., pp. 119-120; 6th An. Rep., p. 7. 



108 Collett, op. cit., 2nd Rep., pp. 226-227. 



