438 



PROTOZOOLOGY 



ritans, C. quinquefasciatus, C. tarsalis, Aedes aegypti and A. sol- 

 licitans. 



P. elongatum Huff (Fig. 199, m-p). In English sparrows and 

 canaries; merozoites 8-12; round pigment granules clumped in 

 schizonts, scattered in gametocytes; gametocytes elongate; schi- 



FiG. 199. a-e, Plasmodium praecox (a-c, schizogony; d, microgame- 

 tocyte; e, macrogametocyte), X1670 (Hartman); f-1, P. cathemerium 

 (f-j, schizogony, XllOO (Hegner and Hewitt); k, microgametocyte; 

 1, macrogametocyte, X1670 (Hartman)); m-p, P. elongatum (m, n, 

 schizonts; o, microgametocyte; p, macrogametocyte), X1330 (Man- 

 well); q-t, P. vaughni (q, r, schizonts; s, microgametocyte; t, macro- 

 gametocyte), X1330 (Manwell). 



zogony usually in erythrocytes of bone marrow; gametocytes 

 numerous in peripheral blood. 



P. vaughni (Novy et MacNeal) (Fig. 199, q-t). In robins, Tur- 

 dus migratorius migratorius ; schizogony completed in probably 

 24 hours; gametocytes similar to those of P. elongatum; number 

 of merozoites from a schizont 4 (4-8); 1-3 pigment granules. 



P. nucleophilum Manwell (Fig. 200, a-d). In catbird, Duma- 

 tella carolinensis ; schizogony completed in probably 24 hours; 

 gametocytes elongate, sometimes curved around nucleus; mero- 

 zoites 4-9; black pigment granules, massed in schizonts, often at 

 one end in gametocytes. 



P. polare Manwell (Fig. 200, e-i). In cliff swallow, Petroche- 



