424 PROTOZOOLOGY 



17.7-20.2ju by 13.7-16.3yu; .si)orulation in 20 hours; associated 

 with serious chronic coccidiosis (Tyzzer). 



E. maxima T. (Fig. 192, g). In mid-gut of chicken; oocysts oval, 

 21.5-42.5/x by 16.5-29.8^. 



E. necatrix Johnson. In small intestine (schizonts) and caecum 

 (oocysts) of chicken; cause of chromic coccidiosis; oocysts obo- 

 vate, 13-23m by 11-18/x; sporulation in 48 hours. 



E. praecox J. In the upper third of small intestine of chicken; 

 oocysts ovoid, 20-25m by 15.5-20^; sporulation in 48 hours. 



E. meleagridis Tyzzer. In caecum of turkey; apparently non- 

 pathogenic; oocysts, ellipsoidal, 19-30/^ by 14.5-23iu. 



E. meleagrimitis T. In lower small intestine in turkey; some- 

 what similar to E. mitis; oocysts, 16. 5-20. 5^ by 13.2-17.2^. 



E. truncata (Railliet et Lucet). In kidney of geese; oocysts trun- 

 cate at one pole, ovoid, 14-23^ by 13-18^; some observers find 

 that this coccidian is fatal to young geese. 



E. anseris Kotlan. In gut of geese; oocysts spherical or pyri- 

 form, ll-lGyLt in diameter. 



E. Idbheana Pinto. In gut of domestic pigeon; oocysts some- 

 times light brown, 15-26/x by 14-24^i. 



E. dispersa Tyzzer. In small intestine of bob-white quail and 

 pheasant; oocysts ovate, 18.8-22.8^ (quail), smaller in pheasant, 

 without polar inclusion; sporulation in about 24 hours. 



E. ranarum (Labbe) (Fig. 192, h). In gut epithelium (nuclei) of 

 frogs; oocysts about 17ai by 12^t. 



E. prevoti (Laveran et Mesnil) (Fig. 192, i). In gut epithelium 

 of frogs; oocysts about 17^4 by 12/i; when sporozoites are fully 

 formed, the spore membranes dissolve. 



E. ranae Dobell (Fig. 192, j). In gut of frogs; oocysts 22^ by 18m. 



E. sardinae (Thelohan) (E. oxyspora Dobell) (Fig. 192, k). In 

 testis of sardine; oocysts spherical 30-50^. 



E. clupearum (Thelohan) {E. wenyoni Dobell) (Fig. 192, /). In 

 liver of herrings, mackerels, and sprats; oocysts, spherical, 18- 

 33m in diameter. 



E. gadi Fiebiger. In swim-bladder of Gadus virens, G. morrhua, 

 and G. aeglefinus; schizogony and sporogony; germination of 

 spores takes place in the bladder of the same host individual, 

 bringing about a very heavy infection; oocysts 26-28m; pathogen- 

 ic (Fiebiger). 



Genus Jarrina Leger et Hesse. Oocysts ovoid, one end rounded 



