594 PROTOZOOLOGY 



specific names were proposed on the basis of difference in host, 

 locality, and effect on the host, but they are so indistinct^ defined 

 that specific separation appears to be impossible. Schizogony in the 

 liver of rat; young gametocytes invade mononuclear leucocytes and 

 appear as haemogregarines; when blood is taken in by the mite, 

 Laelaps echidninus, union of 2 gametes produces vermicular body 

 which penetrates gut-epithelium and reaches peri-intestinal tissues 

 and grows; becoming surrounded by a cyst-membrane, cyst content 

 breaks up into a number of sporoblasts and then into spores, each of 

 which contains a number of sporozoites; when a rat devours infected 

 mites, it becomes infected. 



Genus Karyolysus Labbe. Sporoblasts formed in the oocysts in gut- 

 epithelium of a mite, vermiform sporokinetes, enter host ova and 

 become mature; when young mites hatch, spores in gut-epithelium 

 are cast off and discharged in faeces; a lizard swallows spores; liber- 

 ated sporozoites enter endothelial cells in which schizogony takes 

 place; merozoites enter erythrocytes as gametocytes which when 

 taken in by a mite complete development in its gut. 



K. lacertae (Danilewskj^) (Fig. 254, o) . In Lacerta muralis; 

 sexual reproduction in Liponyssus saurarum; sporokinetes 40-50ju 

 long; spores 20-25/x in diameter (Reichenow, 1913, 1921). 



References 



Allen, Ena A.: (1936) Tyzzeria pernisiona, etc. Arch. Protist., 87: 

 262. 



Andrews, J.: (1928) New species of Coccidia from the skunk and 

 prairie dog. J. Parasit., 14:193. 



— (1933) The control of poultry coccidiosis by the chemical 



treatment of litter. Am. J. Hyg., 14:466. 



and Tsuchiya, H.: (1931) The distribution of coccidial oo- 

 cysts on a poultry farm in Maryland. Poultry Sc. 10:320. 



Aragao, H. B.: (1911) Beobachtungen ueber Haemogregarinen von 

 Vogeln. Mem. Inst. Oswaldo Cruz, 3:54. 



Barksdale, W. L. and Routh, C. F.: (1948) Isospora hominis infec- 

 tion among American personnel in southwest Pacific. Am. J. 

 Trop. Med., 28:639. 



Becker, E. R.: (1933) Cross-infection experiments with Coccidia of 

 rodents and domesticated animals. J. Parasitol., 19:230. 



(1934) Coccidia and coccidiosis. Ames, Iowa. 



(1941) Effect of parenteral administration of vitamin B 1} 



etc. Proc. Soc. Exper. Biol, 46:494. 



— and Crouch, H. B. : (1931) Some effects of temperature upon 

 development of the oocysts of Coccidia. Ibid., 28:529. 



— and Frye, W. W. : (1929) Eimeria ellipsoidalis n. sp., a new 

 coccidium of cattle. J. Parasit., 15:175. 



and Hall, Phoebe R.: (1931) Eimeria separata, a, new spe- 



