MOLLUSCA 
Planorbis bicarinatus, Say (B), (L). Grenadier 
Pond, Etobicoke Creek, Humber 
River. 
* trivolvis, Say. (B), (L). Grenadier 
Pond, Centre Island. 
campanulatus, Say. (B). Grenadier 
Pond. 
exacuous, Say. (B). Grenadier Pond, 
Scarborough Bluffs. 
eS deflectus, Say.? (B). 
parvus, Say. (B). Grenadier Pond, Eto- 
bicoke Creek, Scarborough Bluffs. 
erista, Linné.? Grenadier Pond. 
“c 
Family Physidae. 
Physa heterostropha, Say.? (B). 
“ ancillaria, Say. Grenadier Pond, Don River, 
Etobicoke Creek, Humber River. 
integra, Haldeman. Don River, Etobicoke 
Creek. 
Ancylus parallelus, Haldeman. Etobicoke Creek, 
Centre Island, Grenadier Pond. 
tardus, Say. Grenadier Pond. 
rivularis, Say. Creek in North Toronto. 
“ 
73 
ce 
Family Amnicolidae. 
Amnicola limosa, Say. (B). Grenadier Pond, Eto- 
bicoke Creek, Centre Island, Don - 
River. 
emarginata, Kiister. 
Bythinia tentaculata, Linné. (L). 
291 
“ 
