PARASITOLOGY. 105 



Description. — The body is yellowish white in color ; 

 the male is one and one-half inches long ; the female 

 one and one-half to two inches. Common in U. S. 



A 71 ima Is Infested. — Fowl s . 



Paris Infested. — Small intestines. 



Condition Produced. — Digestive disorders, as indi- 

 gestion and diarrhoea, which may terminate in death. 

 They have been found so numerous as to obstruct 

 the lumen. 



Treatment. — For adult birds, powdered areca nut, 

 twenty to thirty grains, made into pill form. Youn- 

 ger birds should be given doses accordingly. Tur- 

 pentine in doses of from one to two teaspoonfuls, 

 given before feeding. 



Heterakis Papillosa. 



History. — Found common throughout the United 

 States. 



A n iinal Infested. — 'Chickens. 



Part Infested. — Small intestines and caecum. 



Description. — The male measures from one-third 

 to one-half inch in length, the female from one-half 

 to three-fourths inches. The body is white. The 

 mouth is provided with three lips. The caudal ex- 

 tremity of the male is provided with two spiculae of 

 unequal length and a pre-anal sucker surrounded with 

 a vesicular ring. It is provided with a row of papillae. 

 The tail of the female is gradually attenuated to a 

 sharp point. 



OXYURIDAE. 



The worms that belong to the family Oxyuridae 

 are commonly called pin worms. They include a 



