PLASMODIUM. 283 



Habitat. — Blood of Silenus sinicus (Linn.) Nilgiris ; blood of 

 Silenus irus (Cuv.), said to have been imported from Singapore, 

 and in inoculation infections in S. irus (Cuv.), S. rhesus 

 (Audeb.), and S. sinicus (Linn.) ; sporozoites in the salivary- 

 glands of Anopheles annularis Van der Wulp {=A. fuliginosus 

 Giles), A. splendidus Koidzumi (=^. maculipalpis James & 

 Liston), A. maculatus Theobald, and A. culicifacies Giles : 

 Bengal, Calcutta ; Punjab, Kasauli. 



235. Plasmodium inui Halberstadter & Prowazek. (Fig. 126 

 (PI. II).) 



Plasmodiwn inui, Halberstadter & Prowazek, 1907, pp. 37-43, 

 pi. vi; Castellani & Chalmers, 1919, p. 515; Miihlens, 1921, 

 p. 1612 ; Wenyon, 1926, pp. 971-2, pi. xv, figs. 8-14 ; Knowles, 

 1928, p. 439 ; Reichenow, 1929, pp. 1007-8, fig. 993. 



Plasmodium inui, sens, restr., Sinton & Mulligan, 1933, pp. 389- 



95. 

 ^Plasmodium inui, Sinton, 1934 h, pp. 393-410, pis. iii, iv ; Mulligan, 

 1935, p. 310. 



Plasmodium inui, Coatney & Roudabush, 1936, p. 339. 



Young rings about one-fifth to one-fourth diameter of in- 

 fected red ceU ; marked vacuolated appearance, amoeboid 

 movement of lobose nature. Older trophozoites more rounded, 

 mature forms do not fill infected red cell. Mature schizonts 

 with sixteen merozoites which often form a rosette. Chromatin 

 relatively large, prominent, and usually excentric at all stages ; 

 may be divided into two equal or unequal masses in young 

 forms. Pigment yellow to brown, becoming darker with age ; 

 appears early ; fine and abundant with peripheral distribution. 

 Infected red cells shghtly enlarged with older forms ; stipphng 

 less conspicuous, scantier than with P. cynomolgi. Duration 

 of schizogony cycle seventy- two hours. Gametocytes rounded, 

 about the size of normal red cells, with yellowish-brown to 

 brown pigment, scattered and abundant. Female gametocyte 

 with cytoplasm stained deep blue with Romanowsky's stain, 

 with a small chromatin mass, and with scattered and coarser 

 pigment ; when mature, larger than normal red corpuscle, 

 Male gametocyte with large loose chromatin mass and 

 abundant scattered pigment, lighter brown than in the 

 female. 



Remarks. — Sinton (1934 h) has come to the conclusion that the 

 duration of schizogony is seventy-two hours, and not forty- 

 eight hours as reported by MuUigan (1935), to which paper he 

 had access prior to pubHcation. 



Habitat. — Blood of Silenus irus (Cuv.) from Malaya, and in 

 inoculation infections in 8. irus (Cuv.) and S. rhesus (Audeb.) : 

 Punjab, KasauH. 



