136 



DISEASES OF DOGS. 



Tmrda serialis. — A tapeworm about Jyd. to fyd. long when fully 

 grown. It is much like Tosnia ccenurus in appearance. Eodents, 

 and particularly warren-rabbits, are the intermediary hosts. This 

 is not so common in the dog as are some of the other Cestodes. 



TcBiua eehinoeoeaas. — This is the most diminutive of the tape- 

 worms : it consists of three or four segments only. Writiilg in 1879, 

 Dr. Spencer Cobbold (" Parasites of Man and Animals ") says : " In 

 England the Tcmia eehinoeoeeus is excessively rare, and has not been 

 seen in any dog which had not been previously subjected to a feed- 

 ing experiment. " It has always been common in the dogs of Iceland, 



Fig. 26. Head of Tapeworm, showing Suckeks (after Cobbold). 



Northern Russia, and Siberia, and some years ago, when many 

 dogs from northern climes were being imported for fancy and show 

 purposes, I ventured to warn the public that we might be importing 

 this very dangerous parasite with them. I have repeated that warn- 

 ing in regard to the importation of Bussian or Siberian wolfhounds 

 or Borzois, and in a most interesting and instructive letter by 

 Fred C. Mahon, M.R.O.V.S., Tufnell Park, London, in the 

 Veterinary Journal, June, 1892, there is ample proof that my warn- 

 ing was necessary. 



