NATURAL HISTORY, TORONTO REGION 



Carterius tubispenna Mills Sunnyside. 



Spongilla lacustris Linn.* 

 fragilis Leidy.* 



Ephydatia fluviatilis (L.) is probably the sponge 

 recorded from Grenadier Pond by 

 Goadby and Bovell as Spongia fluvia- 

 tilis. 



PEOTOZOA. 



These simplest forms of animal life form a con- 

 siderable part of the plankton or floating life of our 

 waters, and also occur in debris on the bottom and in 

 moist situations of all kinds. Parasitic species are 

 to be found in members of all the other groups, and 

 they even parasitize other Protozoa. The few species 

 reported from this district are, 



(1) By Bovell, from the Humber and Island 

 Ponds, 



Amoeba princeps. 

 Stentor caeruleus. 

 Vorticella convallaria. 

 Leucophrys patula. 



Kolpoda cucullus. 

 Paramecium aurelia. 

 Oxytricha gibba. 

 Chilodon cucullus. 



(2) By Acheson, from tap-water, 



Amoeba proteus. 

 radiosa. 



Difflugia globulosa. 

 Actinophrys sol. 

 Acanthocystis turpacea ? 

 Monas lens. 

 Dinobryon sertularia. 



Dinobryon stipitatum. 

 Salpingoeca fusiformis. 

 Asterosiga sp. 

 Stylobryon petiolatum. 

 Peridinium sp. 

 Vorticella sp. 

 Stentor sp. 

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