192 



PARASITOLOGY. 



coenurus serialis or multiceps serialis. 



Animals Infested. — The adult infests the dog ; the 

 larval or cystic form infests the rabbits and rodents. 

 Parts hiksted — The adult infests the small intes- 

 tines; the larval or cystic form the connective tissue. 

 Symptoyns. — The symptoms of a dog infested by 

 the Taenia Serialis are the same as from infestation 

 with other tape worms. The same treatment is indi- 

 cated. 



Taenia Canina (Canis— dog). 

 Synonym. — Taenia Cucumerina. Dipylidium Cani- 

 num. 



Distributi07i. — The most common tapeworm found 

 in the middle West; found in European countries. 



Description. — The head is suc- 

 ceeded by a narrow, short neck; 

 it is provided with a club-shaped 

 protractile proboscis which is lo- 

 cated in the center of the head 

 between four sucker discs ; this 

 proboscis is provided with four 

 rows of small booklets which point 

 backward ; by means of this pro- 

 boscis and the sucker discs it is 

 enabled to hold firmly to the mu- 

 cous membrane of the small intes- 

 tines of its host. The terminal 

 segments are about one-sixteenth 

 of an inch in width and one half inch long; each seg- 

 ment is provided with two genital pores, one located 

 in the middle of each lateral side. The adult worm 

 measures from five to twelve inches. 

 Liie History. — The intermediate host of the Taenia 



Fiff. 72— 

 Taenia Canina. 



a, Head. 



b, Neck. 



c, Genital pore. 



d, Ripe segments 



