NATURAL HISTORY, TORONTO REGION 



Fredericella sultana (Blumenbach) Bond Lake. 

 Plumatella repens (L.) High Park, Don. 



emarginata Allman Etobicoke. 



punctata Hancock Georgian Bay.* 

 Cristatella mucedo Cuvier Georgian Bay.* 

 Pectinatella magnifica (Leidy) Humber (Osier). 



ROTIFERA. 



The wheel-animalcules are favourite objects of 

 study for the naturalist with a microscope. Jennings 

 has listed 164 species as occurring in the Grea 

 Lakes. Lake Ontario has been scarcely touched. 



Bovell notices the following from the Humbe 

 and Island Ponds, 



Megalotrocha alboflavicans Ehrenb. 

 Floscularia ornata Ehrenb. 

 Rotifer vulgaris Schrank. 



Acheson lists from tap-water, 

 Anuraea stipata Ehrenb. 

 Brachionus sp. 



NEMATELMINTHES. 



The round or thread worms are to be found as 

 internal parasites of practically all our vertebrates, 

 including man himself. Many forms also occur in 

 water or in moist earth. 



Anguillula fluviatilis Tap-water (Acheson). 

 Ascaris microcephala Rud. ? in Bittern (Wright). 



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