POSTGLACIAL BIOTA OF THE GREAT LAKES REGION 



149 



one in the Niagara grave's, should not have lived in this lake, which presented 

 a favorable environment. 



List of Species 



Goat 

 Island 



Pros- 

 pect 

 Park 



Queen 

 Vic- 

 toria 

 Pk. 



Mud- 

 dy 

 Creek 



Whirl- 

 pool 



(Amer- 

 ican) 



Whirl- 

 pool 

 (Cana- 

 dian) 



Fos- 

 ter's 

 Flats 







X 

 X 

 X 













Pleurobema coccineum {magnalacustris?) 

 Elliptio gibbosus 



X 

 X 

 X 

 X 



X 

 X 



X 

 X 





X 

 X 



X 





x 









calceola 















Eurynia ellipsiformis 



X 













" recta 



X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 













Sphaerium strialinum 



X 

 X 



X 





X 







stamineum 





X 





tor sum (vide Sterki) 











Pisidium virginicum 















" compressum 















" abditum 















" ultra-montanum 















" scutallatum 















Campeloma decisum 













X 



Valvata trkarinata 













X 



" sincera 















Amnicola lelsoni 















limosa 













X 



emarginata (=oblusa) 















Pomatiopsis lapidaria 











X 



X 



Pleurocera subulate 



X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 













Goniobasis livescens 



X 



X 



X 



X 



X 





livescens niagarensis 





haldemani 















Physa heterostropha 











X 



X 



Planorbis antrosus ( = bicarinatus) 











X 



" parvus 













X 



Pseudosuccinea columella 















Galba obrussa { = desidiosa) 











X 

 X 



X 



catascopium 











X 















Deposits referable to the Iroquois stage 93 (which is thot by Goldthwait to 

 be older than the formation of Lake Algonquin 94 ) occur near Ithaca, at the 

 south end of Cayuga Lake. These deposits were discovered while making 



93 Tarr, Joum. Geol., XII, p. 79. 



u Bull. Geol. Soc. Amer., XXI, pp. 227-241. 



