INVERTEBRATES 



Ascaris lumbricoides L. in Man. 



" suum Goeze in Pig. 



" equomm Goeze in Horse. 

 Filaria triaeuncha Wright in Bittern (Wright). 

 Ancyracanthus cystidicola (Schn.) in Salmon 



(Wright). 

 Ancyracanthus serratus Wright in Whitefish 



(Wright). 



Echinorhyncus sp. in Whitefish (Morris). 

 Gigantorhyncus gigas (Goeze) in Pig. 



From Montgomery's account of the hair-worms 

 or hair-eels (Proc. Ac. Phil., vol. 59) there are per- 

 haps four species that may be expected to occur here. 



PLATYHELMINTHES. 

 Turbellaria. 



The free-living flat-worms or Planarians are 

 abundant in our waters and may be found on the 

 under surfaces of stones, etc. None seem to have 

 been reported from Toronto. 



Trematoda. 



These animals are when adult internal or exter- 

 nal parasites of vertebrates (for the most part). 



Sphyranura osleri Wright in Mud-puppy (Wright). 

 Polystoma oblongum Wright in Mud-turtle 



(Wright). 

 Octobothrium sagittatum (Leuck.) in Sucker 



I (Wright). 



279 



