COCCIDIA 579 



thick wall, with or without cap, ellipsoidal, 42-60/* by 30-36/*; sporu- 

 lation in about 9 days. Species in North American sheep (Christen- 

 sen, 1938), in Rocky Mountain Bighorn sheep (Honess, 1942). 



E. debliecki Douwes (Fig. 248, &). In the gut of pigs; 30-82 per cent 

 infection in California (Henry); oocysts 12-29/* by 12-20/*; sporula- 

 tion in seven to nine days. Development (Noller and Frenz, 1922). 



E. scabra Henry. In the caecal contents of pigs; oocysts, brown, el- 

 lipsoidal, 22-36/* by 16-26/*. Henry (1931) recognized 2 other species 

 in California swine. 



E. caviae Sheather. In the gut of guinea pigs; oocysts subspherical 

 to ellipsoid, 13-26/* by 13-22/* (Sheather, 1924). Morphology and 

 development (Lapage, 1940). 



E. cants Wenyon (Fig. 248, c). In the gut of dogs; oocysts, ellip- 

 soidal, 18-45/t by 11-28/*; spores 9.5/t by 2.5/*; sporulation in 24 

 hours. 



E.felina Nieschulz. In the gut of cat; oocysts 21-26/* by 13-17/*. 



E. falciformis (Eimer) (Fig. 248, d). In the gut of mice; oocysts 

 spherical to ovoid, 16-21/* by 11-17/*; sporulation in 3 days. 



E. nieschulzi Dieben. In the small intestine of rats; oocysts 16- 

 26.4/* by 13-21/*; sporulation in 65-72 hours. Growth-promoting 

 potency of feeding stuffs (Becker, 1941 ; Becker, Manresa and Smith, 

 1943). 



E. separata Becker and Hall (Fig. 248, e). In the caecum and colon 

 of rats; oocysts 13-19.5/* by 11-17/*; sporulation in 27-36 hours. 



E. miyairii Ohira (Fig. 248, /). In the small intestine of rats; 

 oocysts 16.5-29/* by 16-26/*; sporulation in 96-120 hours. Unsporu- 

 lated oocysts perish in 15 seconds at 53°C. and in 24 hours at 41°C. ; 

 sporulated oocysts are killed in two minutes at 52°C. (Reinhardt 

 and Becker, 1933). Structure of oocyst wall (Henry, 1932); Eimeria 

 in rodents (Fish, 1930; Henry, 1932a; Roudabush, 1937a). 



E. mephitidis Andrews (Fig. 248, g). In the faeces of the common 

 skunk; oocysts oval to spherical, 17-25/* by 16-22/*; wall 1/* thick; 

 a circular micropyle; spores with a rostrum, 10-12/* by 7-9/*; ex- 

 tended sporozoites 10-14/* by 4-5/*; other stages unknown (An- 

 drews, 1928). 



E. cynomysis A. (Fig. 248, h). In the faeces of the prairie dog; oo- 

 cysts oval, 33-37/* by 28-32/*; a double fibrous wall, 1.5-2.5/* thick; 

 the inner wall slightly orange-yellow; micropyle 5-6 /* in diameter; 

 spores, broad pyriform, 13-17/* b}^ 8-12/*. 



E. citelli Kartchner and Becker (Fig. 248, i). In the caecal contents 

 of the striped ground squirrel, Citellus tridecemlineatus; subspherical 

 to ellipsoidal oocysts 15-23/* by 14-19/*. 



