178 



SPOROZOA. 



Remarks. — ^This form was originally described as a parasite 

 of the Hver of herrings, mackerel and sprats. Wenyon 

 (1915 h) found the ripe oocysts in the faeces of a patient 

 retm-ned to England from GaUipoH. Dobell (1919 a), con- 

 sidering it to be a human parasite, named it E. wenyoni. 



Fig. 81. 



Fig. 8i 



Fig. 81. — Oocyst of Eimeria dupearum, (Thelohan). (After Dobell and 



O'Connor.) 

 Fig. 82. — Eimeria faurei (Moussu & Marotel). A, immature oocyst ; 



B, mature oocyst. (From Wenyon, after Noller, Schur- 



johann, and Verbrodt.) 



Knowles (1924) recorded it from the fseces of a man at Calcutta. 

 Thomson and Robertson (1926) have shown that the oocysts 

 ofE. dupearum occur in large numbers in the liver of herrings, 

 mackerel and sprats, and that tliis is the source of the 

 oocysts in human fseces. 



Habitat. — ^Fseces of man : Bengal, Calcutta. 



105. Eimeria columbse Mitra & Das-Gupta. 



'\Eimeria columbse, Mitra & Das-Gupta, 1937 6, p. 291. 



Oocysts subspherical, tetrasporocystid. Oocystic residuum 

 present. Sporocyst dizoic. 



Dimensions. — ^Maximum size of oocyst 16'4/x by 14'35/x. 



Remarks. — Full description of the species has not yet been 

 pubhshed. Tetrasporocystid dizoic condition was observed 

 after keeping the oocysts in 1 per cent, chromic acid for four 

 days. It is said to differ from E. avium (Silvestr. & Rivolta) 

 in the oocysts being subspherical, and from E. pfeijferi Labbe 

 in oocystic residuum being present. 



Habitat. — Intestine of the pigeon, Columba livia intermedia 

 Strickland ; Bengal, Calcutta. 



