194 PARASITOLOGY. 



Life Cycle. — Rats and mice become infested 

 through food and water, in which animals the cystic 

 or hydatic stage develops. The cyst is ovoid in 

 shape, about the size of a pea and contains a single 

 larva; the cystic form is called cysticercus fascio= 

 laris. 



Ajiimals Infested. — The cat, rat and mouse. 



Parts Infested — The adult infests the intestines 

 of the cat; the larval or cystic form, rats and 

 mice. 



Treatment. — Same as for dogs, with corresponding 

 smaller dosage. 



BOTHRIOCEPHALIDAE. 



This family includes a group of worms which are 

 close allies of the tapeworms. The head is oblong 

 and is provided with two suckers arranged on the 

 sides of the head in the form of slits. Each segment 

 is provided with one genital pore, which is located in 

 the center of the ventral surface. There is one 

 genus, viz., Bothriocephalus. 



BoTHRiocEPHALUS Latus (Bothrida — sucker) 



(Latus — broad) . 



Synonym. — Pit-headed tapeworm. 



Distribution. — Found in Japan, Switzerland, 

 Holland and other countries. 



Description. — Its head is elongated and followed 

 by a long, slender neck ; the head is provided with 

 two suckers in the form of slits, located on the sides 

 of the head ; the segments are very short ; the widest 

 ones reach one-half inch in width. The genital pore 

 is located in the center of the ventral side of each 



