NATUKAL HISTOKY, TOKONTO KEGION 



Eucrangonyx gracilis (Smith) Bond Lake. This 

 is perhaps the Crangonyx (?) sp. of 

 Nicholson from the Bay. 



Gammarus fasciatus Say Humber, Sunnyside, 



Toronto Bay, Don, etc. 

 limnaeus Smith Georgian Bay.* 



Hyalella knickerbockeri (Bate) Etobicoke, Hum- 

 ber, Black Creek, Sunnyside. 



Isopoda. 



The aquatic forms are found in company with 

 the shore forms of the previous group, but they are 

 crawlers rather than swimmers. 

 Mancasellus tenax (Smith) Island. 



" " dilata (Smith) Georgian Bay.* 



Asellus communis Say Etobicoke, Humber, Sunny- 

 side, Toronto Bay. 



The terrestrial species, known commonly as pill- 

 bugs or woodlice, are to be found under nearly every 

 board, stone, etc. 



Oniscus asellus Linn. near Niagara.* 

 Cylisticus convexus (De Geer) Saginaw, Michi- 

 gan.* 

 Porcellio rathkei Brandt. 



spinicornis Say Niagara.* 

 " scaber Latreille Niagara.* 



Phyllopoda. 



The phyllopods, though larger than the animals 

 of the three following groups, have a habitat similar 



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