HAEMOSPORIDIA 617 



the host-cell nucleus; schizogony in 48 hours; 13-30 merozoites; 

 gametocytes elongate, with a few haemozoin granules; transmission 

 by Theobaldia (Herman, 1938b). 



P. polare Manwell (Fig. 264, g). In cliff swallow (Petrochelidon I. 

 lunifrons) ; grown schizonts at one of the poles of host erythrocytes; 

 8-14 merozoites from a schizont; few in peripheral blood; gameto- 

 cytes elongate (Manwell, 1935a). 



P. nucleophilum M. (Fig. 264, h). In catbird (Dumatella carolin- 

 ensis); schizogony in 24 hours; 3-10 merozoites from a schizont; 

 mature schizonts usually not seen in the peripheral blood; gameto- 

 cytes elongate, often seen closely applied to the host-cell nucleus; 

 haemozoin granules at one end (Manwell, 1935a). 



P. gallinaceum Brumpt (Fig. 264, i). In domestic fowl (Gallus 

 domesticus) in India; schizogony in 36 hours; 20-36 merozoites from a 

 schizont; gametocytes round, with few haemozoin granules; host-cell 

 nucleus displaced; pheasants, geese, partridges and peacocks are 

 susceptible, but canaries, ducks, guinea fowls, etc., are refractory; 

 transmitted by Aedes (Brumpt, 1935). E.-E. development (p. 602); 

 vectors (Russell and Mohan, 1942); phosphorus 32 in study (Clarke, 

 1952); nucleic acids (Lewert, 1952). 



P. hexamerium Huff (Fig. 264,,/). In bluebird (Sialias. sialis) and 

 Maryland yellow-throats; schizogony in 48 or 72 hours; grown schi- 

 zonts often elongate; 6 merozoites from a schizont; gametocytes 

 elongate (Huff, 1935). 



P. oti Wo If son (Fig. 264, k). In eastern screech owl (Otus asio 

 naevius) ; 8 merozoites from a schizont ; body outlines irregular, rough ; 

 gametocytes elongate. Manwell (1949) considers this species identi- 

 cal with P. hexamerium. 



P. lophurae Coggeshall (Fig. 264, 1). In fire-back pheasant (Loph- 

 ura i. igniti) from Borneo, examined at New York Zoological Park; 

 8-18 merozoites from a schizont; gametocytes large, elongate; host- 

 cell nucleus not displaced; canaries are refractory, but chicks and 

 especially ducks are highly susceptible (Coggeshall, 1938, 1941; 

 Wolfson, 1940) ; young ducklings succumb less readily to its infection 

 than older ducks (Becker, 1950). Experimentally Aedes aegypti, A. 

 albopictus and Anopheles qvadrimaculatus serve as vectors, but not 

 Culex pipiens (Jeffery, 1944). Characteristics (Terzian, 1941); culti- 

 vation (Trager, 1950). 



A number of lizards have recently been found to be infected by 

 Plasmodium. A few species are described here briefly. Species 

 (Thompson and Huff, 1944a; Laird, 1951). 



P. mexicanum Thompson and Huff (Fig. 265). In Sceloporus fer- 



