160 LIFE OF THE PLEISTOCENE 



A mnicola limosa Galba elodes 



" limosa porata Succinea avara 



Polygyra monodon 



The tusk of an elephant eleven inches long and three inches in diameter 

 was found in Adair's pit. 



At Niagara Falls, on the Canadian side, fresh-water shells occur in many 

 places. In a deposit of sand and gravel lying between the Clifton House and 

 the old toll-gate below, the species indicated below were found : 114 



* Elliptic complanalus Goniobasis acuta ( = haldemani) 



" gibbosus " *conica m 



Obovaria ellipsis liiiescens 



Eurynia recta Physa heterosiropha 



Alasmidonta marginata Planorbis bicarinatus { = antrosus) 



*Sphaerinm simile *Galba caperata 



*Pisidium dubium { = virginicum) *Lymnaea stagnalis appressa 



Campeloma decision *Polygyra albolabris 

 *Amnicola limosa porata 



This deposit is between the ancient bank of the river and the edge of the 

 present gorge and is clearly referable to the Iroquois stage. 



Deposits of gravel in Queen Victoria Park contain several species of mol- 

 lusks which are listed by Coleman 145 and Kindle and Taylor; 146 the latter authors 

 refer the deposits to the recent stage of the Niagara River rather than to the 

 Lake Iroquois stage. Some of the deposits may, however, be older, as remarked 

 by Kindle and Taylor, and the gravels containing the shells may have been 

 laid down in a late stage of Lake Iroquois. The list includes four species not 

 in Letson's Goat Island catalog; one of these (Unio clams) may be a case of 

 misidentification, this usually being a species of more southern distribution. It 

 is, therefore, eliminated from the list below. 



Fusconaja solida Sphaerium striatinum 

 Pleurobema coccineum solidulum 



Elliplio gibbosus Pleurocera subidare 



Eurynia recta Goniobasis livescens 



Lampsilig luteola Physa heterosiropha 



" occidens ( = venlricosa) Galba desidiosa ( = obrussa) 



The presence of two feet of weathered till beneath the Iroquois gravels 

 suggests, says Coleman, a low water stage between Lake Warren and Lake 

 Iroquois. This low water stage must have been of considerable duration, be- 



144 Bell, Can. Nat., VI, page 46. These names have not been verified. Those marked 

 with an * are not included in Miss Letson's list. Bell's specimens are not now to be found in 

 the Geological museum at Ottawa. What the species really was that is recorded as Unio 

 cotnplanatus it is impossible to conjecture, as Unio gibbosus is also listed. As the later writers 

 have failed to find this naiad in these deposits it must be looked upon as an erroneous identi- 

 fication until the original specimens are found, if they are still in existence. 



146 12th Inter. Geol. Cong., Toronto, Canada, Guide Book No. 4, p. 42, 1913. 



»« Niagara Folio, p. 14, 1913. 



