486 



TELOSPORIDIA 



into schizonts in liver cells. The schizont divides into a large number of 

 merozoites, leaving no residual mass of undivided cytoplasm. The mero- 

 zoites probably infect the red blood cells, and after a time can escape into 

 the liquor sanguinis as free trophozoites, and invade the liver cells. 

 What happens to the free vermicule is not known. 



Haemogregarina funambuli Patton, 1906. 

 Synonym. — Leucocytozoon funambuli V&tton, 1906. 



This parasite was found by Patton in the large mononuclear leucocytes of 

 Funamhulus pennatii (the Kathiawar palm-squirrel). 



It is found in cysts in the leucocytes, and as free forms in the plasma. No 

 evidence of schizogony could be found. In the gut of the louse {Hcsmato- 

 pinus sp.) parasitic on these squirrels vermicules could be found, and also in 

 the coelome, but no further development took place. 



Haemogregarina ratti Adie, 1906. 

 This is a haemogregarine found in the leucocytes of Epimys rattus. 



Hsemogregarina felis Christophers, 1906. 



Like H. canis, only found in cats. It was discovered by Patton. Schizo- 

 gony and sporogony unknown. 



H^MOGREGARINES OF REPTILIA. 



Haemogregarines 0! thje Grocodilia. 



H. hankini Simond, looi, in Gavialis gangeticus Gmel. ; H. crocodilinovum 

 Borner, 1901, in OsteotcBmus tetraspis Cope, and in C. cataphomctes Cuv. 



Haemogregarines of the Chelonia. 



A very large number of haemogregarines are known in Chelonia, but the 

 best-studied life-history is that of H. stepanovi. 



Haemogregarina stepanovi Danilewsky, 1889. 



H. stepanovi is a parasite in the red blood -corpuscles of tortoises- — e.g., 

 Emys orbicularis L. and Cistudo. 



It appears in two forms — one kidney-shaped, and the other long and thin, 

 and bent upon itself. 



The young trophozoite is club-shaped, and grows into the broad kidney 

 form, which in the bone-marrow, liver, or spleen breaks up into merozoites, 

 which, escaping from the red cell, complete the cycle by entering new cells. 



The trophozoite grows into a large oval form, which elongates until it gives 

 rise to the long thin form which is bent upon itself. If blood containing this 

 form is sucked by a leech {Placobdella catenigem Moqu.-Tand), it escapes from 

 the corpuscle in the intestine, and, entering between the epithelial cells, 

 develops into a macrogamete or a microgamete, and forms an ookinete, which 

 wanders into the bloodvessels around the intestine, and so gets to the pharyn- 

 geal glands, in which it becomes an oocyst forming numerous sporoblasts and 

 sporozoites, which complete the cycle of sporogony by entering the tortoise, 

 when it is again bitten by the leech. There is also evidence of the infection 

 of the ova of the leech in the finding of sporozoites in the pharyngeal glands 

 of immature embryo leeches. 



Haemogregarina nicoriae Castellani and Willey, 1904. 

 This parasite is common in the tortoises {Nicoria trijuga Schweigg) which 

 are found in the ditches and marshy lands round Colombo, and also in Colombo 

 Lake. The young trophozoite grows into the schizont, which divides into 

 merozoites. 



