PARASITOLOGY. 147 
under favorable conditions the larval form develops; 
thus the sheep become infested through food and 
water; the embryo may be carried by small streams 
of water and thus spread contagion. 
Conditions Produced.—Seldom cause serious results, 
but if found in large numbers they may cause con- 
ditions similar to these caused by the Strongylus 
Contortus, such as unthrifty coat, partial loss in wool 
crop, diarrhoea, anemia, and if in sufficient nurobers 
emaciation and death. 
Treatment.—The same as for the Strongylus 
Contortus. Ce pt 
‘ited Uneparia CANINA (Canis—dog). 
Synonyms.—Uncinaria Trigonocephala. Dochmius 
Trigonocephala. Anchylostoma Trigonocephala. 
Distribution.—Common in the United States, also 
found in Europe. 
Description.—It has a thread-like body, white in 
color; a large buccal cavity; the mouth is provided 
with six hook-like teeth; by means of these hooklets 
it holds firmly to the mucous membrane and aided 
by its strong muscular oesophagus draws blood; 
they are still found attached to the mucous mem- 
brane after death of the dog; the tail of the male 
has a well developed caudal pouch; the tail of the 
female terminates in a sharp point; the male is about 
one-half inch long, the female three-fourths inch. 
Life History—Same as the other species of the 
Uncinaria. The methods of infestation are the same. 
Animals Intested.—The dog, cat, and fox. 
Parts Infested. —Small and large intestines. 
Symptoms.—Uncinariosis among the dogs is very 
common; it is more fatal among puppies than older 
