328 Veterinary Medicine. 



may be from one to six inches in length. The cyst has been 

 experimentally developed in the intestine of the cat (Von Siebold) 

 and the ripe segments of the Crassicollis have developed the pipe- 

 like cyst in the liver of the rat (Baillet). It appears to have been 

 the suggestive resemblance of the pipe cysticercus of the rat to 

 the T. Crassicollis of the cat that induced Von Siebold to experi- 

 ment with the cyst on the cat, and thus to ellucidate the method 

 of evolution of the tape-worms. 



Pathogenesis. T. Crassicollis is common in the small intestine 

 of the cat and if solitary does not seem to seriously impair the 

 health, yet when very numerous they may be the cause of serious 

 ill health which may even assume the form of an epizootic. Such 

 out-breaks have been noticed in Italy (Romano), in the Black 

 Forest (Lydtin), and in Austria (Zschokke). 



Symptoms were gradual loss of appetite, vomiting, retracted 

 abdomen, alternation of diarrhoea and constipation, salivation, 

 emaciation, loss of weight, colics, deafness, epilepsy, and the 

 passage of proglottides with the faeces. 



Lesions consisted in the presence of the tape-worms, intestinal 

 catarrh, enteritis, gastric catarrh, and in certain cases rupture of 

 the intestine (Perroncito, Grassi and Parona). 



Treatment is the usual tseniafuge course. 



Taenia EUiptica. This bears a great likeness to T. Canina 

 but is at least a variety as the segments develop much more 

 rapidly and it appears to be absent from Iceland where T. Canina 

 abounds. Krabbe who made this observation found T. EUiptica 

 in half the cats examined in Copenhagen, one containing as many 

 as 600. Its length is 10 to 30 centimetres, greatest breadth 

 3 mm. Eggs globular .49 to .54JU, in diameter. 



The larval form of this taenia is unknown. 



Taenia Litterata. This is supposed to be identical with the 

 T. Litterata of the dog, though Baillet claims a distinction in the 

 smaller size of the ova, 31 to 36 ju.. 



Bothriocephalus Felis. B. Decipiens. Dibothrium 

 D. B. Latus. A number of observers have found Bothrio- 

 cephalus in the domestic cat, but the exact species in the different 

 cases has not been rendered quite certain. The characters as 

 given by Davaine were : ' ' Head oblongate oval ; lateral bothrida 

 opening backward and mostly closed by approximation of their 



