W. Nicoll 
289 
Amongst the numerous animals which figure as intermediate hosts 
mention may be made of cattle, sheep, pigs, deer of various kinds, 
goats, horses, donkeys, dogs, rabbits, kangaroos, etc. Several species 
of monkeys.and apes are also already known as hosts of hydatids, for 
instance, Inuus cynomolgus, Inuus ecaudatus, and Theropithecus silenus. 
The camel, dromedary, giraffe and tapir also figure amongst the inter¬ 
mediate hosts. It would in fact appear as if all the larger Mammalia 
are possible hosts. It would indeed be of considerable interest to 
discover any species of the larger mammals which can be shown con¬ 
clusively to be immune to infection with this parasite. 
