1931 ANNUAL REPORT, 1931 43 



Cestoda 



Taenia sp Intestines 



LYNX 



Nematoda 



Toxocara mystax, Zeder, 1800 Intestines 



Physaioptera sp Intestines 



MUSKRAT 

 Trematoda 



Nudacotxle novicia, Barker, 1916 Intestines 



Echinostomiim coalitiim, Barker, 191,5 Intestines 



Echinostomiim callaivavensis, Barker and Noll, 1915 Intestines 



Plagiorchis proximus, Barker, 19 15 Intestines 



Echinoparvphium contiguum, Barker and Bastron, 1913 Intestines 



Notocotvlequinqueseriale, Barker and Laughlin, 1915 Intestines and Cecum 



Catatro'pis li lament is, Barker, 1915 Intestines and Cecum 



Wardius zibethicus, Barker and East, 1915 Intestines 



Hemistomiim craterum, Barker and Noll, 1915 Intestines and Cecum 



Philostomum ondatrae, Price, 193 1 Liver 



Echinochasmus schivartzi, Price, 193 1 Intestines 



Alaria mustelae, Bosma, 193 1 Intestines 



Echinostomiim armigeriim, Barker and Irvine, 19 15 Intestines 



Cestoda 



Hymenolepis evaginata, Barker and Andrews, 1915 Intestines 



Cysticercus fasciolaris = Taenia taeniaeformis Li\-er 



Nematoda 



Hepalicota hepatica, Bancroft, 1893 Liver 



Sporozoa 



Eimeria stiedae, Lindemann, 1865 Liver 



WOLF 

 Trematoda 



Alaria americana, Hall and Wigdor, 1918 Intestines 



Cestoda 



Taenia pisiformis, Bloch, 1780 Intestines 



RACCOON 

 Nematoda 



Ascaris sp Intestines 



Phvsaloptera sp Intestines 



Ca'pillaria sp Intestines 



BEAVER 



Trematoda 



Cladorchis subtriquetrus, Rud., 1814; Fischoeder, 1901 Intestines 



REPORT OF THE BIOLOGICAL AND FISH CULTURE BRANCH 



The chief function of the Biological and Fish Culture Branch of the Ontario 

 Department of Game and Fisheries is to apply the science of biology to all 

 problems affecting the production, maintenance and usefulness of fish. How 

 this function is carried out will be best understood by reading the descriptions 

 and explanations set forth in the paragraphs which follow. 



In recent years there has been a progressive development of a scientific 

 or technical component centralized in the Department and covering at least the 

 immediate and practical requirements of the fisheries and fish cultural services. 

 On account of the routine nature of the work, the fisheries laboratory does not 

 presume to enter into research problems which are more fittingly carried out in 

 university laboratories; for example, problems which involve research in organic 

 chemistry over a period of years. The same thing applies to life-history studies 



