170 



SPOROZOA. 



99. Isospora knowlesi Ray & Das-Gupta. (Fig. 77.) 



■fisospora sp., Knowles & Das Gupta, 1935, pp. 703, 705, pi. xxx, 



figs. 14, 20. 

 Isospora knowlesi, Ray & Das-Gupta, 1937 c, pp. 269—74, pi. vii. 



Young gametocyte intranuclear. Male gametocyte gives 

 rise to biflageUate gametes which drop into the lumen of the 

 intestine or penetrate the neighbouring epithehal cells. 

 Oocysts thick-walled, spherical. Sporocysts elhpsoidal, with 

 a knob-Hke structure at one pole. Sporozoites arranged 

 regularly, with large sporocystic residue. Unsegmented 

 or segmented but immature oocysts discharged from the host. 

 Sporulation takes place in 4 to 5 days. 



Fig. 77. — Isospora knowlesi Ray & Das-Gupta. A, oocyst within the 

 nucleus of a host-cell ; B, oocyst from the faecal matter ; 

 C, manure oocyst. (After Ray & Das-Gupta.) 



Dimensions. — Oocysts 18-23 /x in diameter; sporocysts 12- 

 15^ by 8-10/x. 



Remarks. — The oocysts resemble those of Isosjiora mesnili 

 Sergent (1902) in being intranuclear in habitat, and approach 

 those of/, camilleri Hagenmuller (1898) in size. 



Habitat. — Nuclei of epithelial cells oiF the small intestine of 

 Hemidactylus flaviviridis (Riippell) : Bengal, Calcutta. 



100. Isospora minuta Mitra & Das-Gupta. 



Isospora minuta, Mitra & Das-Gupta, 1937 a, p. 291. 



Oocysts disporocystid, final stages of sporogony taking place 

 outside the body of the host. Sporocysts spherical. Oocystic 

 residue absent. 



Dimensions. — Maximum size of oocyst 15 /a by 7-5 /x ; sporo- 

 cyst 7-5 /A in diameter. 



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



