NATURAL HISTORY, TORONTO REGION 
Eucrangonyx gracilis (Smith)—Bond Lake. This 
is perhaps the Crangonyx (?) sp. of 
Nicholson from the Bay. 
Gammarus fasciatus Say—Humber, Sunnyside, 
Toronto Bay, Don, ete. 
limnaeus Smith—Georgian Bay.* 
Hyalella knickerbockeri (Bate)—Etobicoke, Hum- 
ber, Black Creek, Sunnyside. 
ce 
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. 
me “  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, ete. 
Oniscus asellus Linn.—near Niagara.* 
Cylisticus convexus (De Geer)—Saginaw, Michi- 
gan.* 
Porcellio rathkei Brandt. 
. spinicornis Say—Niagara.* 
seaber Latreille—Niagara.* 
Phyllopoda. 
The phyllopods, though larger than the animals 
of the three following groups, have a habitat similar 
274 
“ 
