REPORT — 1000. 



stage of xVmerican geologists, covered the Toronto formation with a com- 

 plex series of layers of boulder clay and stratified sand and clay reaching 

 a thickness of 200 feet at Scarborough Heights. 



Accounts of the fossils of the Toronto formation have been given in 

 previous reports of this Committee and in various articles in geological 

 journals, but in this final report it is thought wise to give a more complete 

 list of the species collected, including a large number that have not yet 

 been published. As the trees will be taken up in Professor Penhallow's 

 report, the present list is confined to the interglacial fauna. The forms 

 occurring in the lower, warm climate beds will be given 

 wards those of the cool climate. 



lirst, and after- 



Fauna of Warm Climate Beds, Don Valley. 



Vertthrata ; possibly mammoth or mastodon and bison, and an undeter- 

 mined fish, 

 several undetermined beetles and cyprids. 



Arth^opoda 

 MoUusca : 



Unio undulatus 

 „ rectus 



• still livino; in Lake Ontario. 



still livin< 



,, luteolus 



„ gibbosus 



„ phaseolus 



,, pustulosus 



,, trigonus 



„ occidens 



,, solidus 



,, clavus 



,, pyramidata 



Anodonta grandis, not reported from Canada 



in Lake Erie, but not reported 

 from Lake Ontario. 



not known in the St. Lawrence system of 

 waters, but living further south. 



Sphaerium rhomboideum 

 „ striatinum 



,, sulcatum 



„ solidulum 



,, similis (?) 



Pisidium Adamsi 



,, compressum 



,, novaboracense (?) 



Pleurocera subulare 

 ,, elevatum 



,, Lewisi (?) 



Goniobasis depygis 



„ Haldemani 



Limnaea decidiosa 

 elodes 



Planorbis parvus 



,, bicarinatus 



Amnicola limosa 

 ,, porata 



,, sagana 



Physa heterostropha 

 ,, ancillaria 



Succinea avara 



Bythinella obtusa 



Somatogyrus isogonus 



Valvata sincera 

 „ tricarinata 



Campeloma decisa 



Bifidaria armata (land snail) 



In all there are thirty-eight undoubted species of molluscs, and three 

 more probably, included in the fauna. Of these eight or ten have not been 

 reported from Lake Ontario, but occur further south. 



