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MOLLUSCA

Family Viviparidae. Campeloma decisa, Say.

GASTEROPODA PULMONATA (TERRESTRIAL).

Family Helicidae.

Vallonia pulchella, Miller. (L).

Polygyra tridentata, Say. (B). Scarborough Bluffs.

,,

albolabris, Say. Don River.

palliata, Say. (B).

,,   monodon, Rackett. (B).

Family Pupidae.

Bifidaria armifera, Say. (L). Humber River. Vertigo milium, Gould. Scarborough Bluffs.

Family Achatinidae.

Cochlicopa lubriea, Muller. (L). Humber River.

Family Circinariidae. Circinaria concava, Say (B).

Family Zonitidae

Vitrea cellaria, Muller. (B), (L).

Zonitoides arborea, Say. (L). Don River, Humber

River, Centre Island. Gastradonta ligera, Say.

Omphalina fuliginosa, Griffith. (L).

Family Limacidae.
Agriolimax agrestis, Linnaeus. (L). Don River,

Humber River, Centre Island.

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