480 PROTOZOOLOGY 



Genus Klossiella Smith and Johnson. Microgametocyte produces 

 2 microgametes; oocyst with many spores, each with numerous 

 sporozoites; in the kidney of mammals. 



K. muris S. and J. (Fig. 223, d, e). Oocyst with 12-16 spores; 

 spore with about 25 sporozoites, discharged in the host's urine; in the 

 kidney of mouse. 



K. cobayae Seidelin. Oocyst with 8-20 spores; spore with about 

 30 sporozoites; in the kidney of guinea pig. 



Genus Legerella Mesnil. Oocyst contains numerous sporozoites; 

 spores entirely lacking; in arthropods. 



L. hydropori Vincent (Fig. 223,/). In the epithelium of Malpighian 

 tubules of Hydroporus palustris; oocysts ovoid, 20-25/x long, with 

 16 sporozoites which measure IT^t by 3/i. 



Genus Chagasella Machado. Oocyst with 3 spores, each with 4 

 or 6 (or more) sporozoites; in hemipterous insects. 



C. hartmanni (Chagas). In the gut of Dysdercus ruficollis; oocysts 

 with 3 spores about 45/i in diameter; spore with 4 sporozoites, about 

 35m by 15m. 



Family 2 Haemogregarinidae Leger 



With 2 hosts: vertebrates (circulatory system) and invertebrates 

 (digestive system) . 



Genus Haemogregarina Danilewsky. Schizogony takes place in 

 blood cells of vertebrates; merozoites develop into gametocytes; 

 when taken into gut of leech or other blood-sucking invertebrates, 

 sexual reproduction takes place; microgametocyte develops 2 or 4 

 microgametes; sporozoites formed without production of spores. 



H. stepanowi D. (Fig. 224). Schizogony in Emys orbicularis and 

 sexual reproduction in Placobdella catenigera; sporozoites introduced 

 into blood of the chelonian host by leech (a), and enter erythrocytes 

 in which they grow (d-g) ; schizogony in bone-marrow, each schizont 

 producing 12-24 merozoites (h); schizogony repeated (i); some 

 merozoites produce only 6 merozoites (j, k) which become gameto- 

 cytes (l-o); gametogony occurs in leech; 4 microgametes formed 

 from each microgametocyte and become associated with macro- 

 gametocytes in gut of leech (p-r) ; zygote (s) divides three times, and 

 develops into 8 sporozoites (t-w). 



Haemogregarines are found commonly in various frogs (Fig. 223, 

 g, h) and less commonly in fishes (Fig. 223, i-m). 



Genus Hepatozoon Miller, Schizogony in the cells of liver, spleen, 

 and other organs of vertebrates; merozoites enter erythrocytes or 

 leucocytes and develop into gametocytes; in blood-sucking arthro- 



