26 3 



or thick films of various viscera. Examine for cystic 

 stages, with a low power lens, especially the liver, 

 or in the case of snakes, the lungs. 



HAEMOGREGARINES OF MAMMALS 



i. Hg. balfouri. In the jerboa (Jaculus spp.) 

 four forms occur, (i) Endoglobular, sausage-shaped 

 parasites, about 6 by z//, in size, with a voluminous 

 nucleus. The red cells are deformed and may 

 be reduced to a mere trace. (2) Free forms, 

 of the same appearance as the former. They are 

 most readily found in liver smears. (3) A 



Fig. 79. (a) Hg. balfouri, endoglobular parasite; 

 (b) vermiculi ; (c) cyst with merozoites ,% 

 (d) Hg. gerbilli, endoglobular parasite ; 

 (e] vermicide 



typical motile vermicule, 15/4, long (rarely found). 

 (4) Schizogony occurs in the liver the final stage is 

 that of a cyst, formed by the remains of the liver cell, 

 containing merozoits. The cysts measure 23 by 17^ 

 (but some are much longer and others smaller), con- 

 taining as many as thirty merozoits (Fig. 79). 

 The mode of development is unknown. 



