THE COCCIDIIDBA. 



25 



^nos/'tt of the skin in many animals, and especially birds — the 

 so-called "canker" of pigeons; piroplasmosis in cattle, dogs, 

 &c., such as Eedwater and East Coast fever in cattle ; and 

 malignant Jaundice in dogs ; and the Malarial fever of man. 



The Coccidiidea. 



These are parasitic in the epithelial cells, and always with 

 distinct alternation of generatiojis — namely, endogenous non- 

 sexual schizogony and exogenous sexual sporogony. The epi- 

 thelium most usually attacked is that of the gut and the liver. 



Coccidiosis is a common complaint aifecting the liver of the 



Fig. 5. — CocciDiUM oviforme of Rabbit's Liver. After Balbianj. 



a, b, c, Young Coccidia in epithelium of liver ; cl, e, /, encysted adult Coccidia ; 

 ff-l, development of sporobla.sts ; ™, mature sporoblast, showing the two falciform 

 bodies ; n, the two spores separate ; o, a falciform spore — y, its nucleus. (From Par. 

 Dis. Ani., Neumann.) 



rabbit, and is produced by the species known as GoKidiuin 

 oviforme (fig. 5). This sporozoan is ovoid when adult, and 

 enclosed in a double-contoured shell from 30/i to 50/U. long and 

 from 20/u. to 28/x broad. These extremely minute bodies become 



