PLASMODITJM. 289 



natural malarial infections which have been reported from 

 Indian monkeys, namely, by Klnowles (1919), by Chimisso 

 (1922), and by Scott (1926), all appear to be due to P. semno- 

 pitheci. 



Habitat. — Blood of the entellus monkey or hanuman, 

 Pygathrix entellus (Dufr.) {= Semnopithecus entellus) : Assam ; 

 blood of Presbytes pileatus Blyth : Assam, in the Zoological 

 Gardens, London. Also blood of Silenus rhesus (Audeb.), 

 believed to be from India, examined in Italy. 



240. Plasmodium bubalis Sheather. (Fig. 138.) 



■fPlasmodium bubalis, Sheather, 1919 a, pp. 1-5, pis. i, ii ; 1919 b, 



p. 223. 

 Ptasmodium bubalis, Muhlens, 1921, p. 1616. 

 ■^Plasmodium bubalis, Edwards, 1925, p. 50. 



Plasmodium bubalis, Wenyon, 1926, pp. 975-6, pi. xvi, figs. 13-17 ; 

 Knowles, 1928, p. 442, fig. 102, 15, 16 ; Reichenow, 1929, p. 1009 ; 

 Coatney & Roudabush, 1936, p. 338. 

 ^Plasmodium bubalis, Taylor, 1938, p. 42. 



Resembles P. malarias in many respects. Smallest parasites 

 round, oval or pyriform ; pigment has appeared in parasites 

 3/x in size. Larger parasites, 6^ in size, generally round, 



A B C D E 



Fig. 138. — Plasmodium bubalis Sheather. A, young trophozoite ; 

 B, double infection with two trophozoites ; C, large 

 trophozoite ; D, schizont ; E, merozoites escaping from the 

 corpuscle. (After Sheather.) 



sometimes oval, and possess a central vacuole. Chromatin 

 is peripheral, single or double, and the pigment in the cyto- 

 plasm is scattered or in clumps. The larger parasites have 

 a regular outHne and cause a shght enlargement of the infected 

 red blood- corpuscle. Adult schizont completely fills the cor- 

 puscle, produces seven to fourteen merozoites, and the pigment 

 is aggregated in a single clump. Some of the large forms with 

 a single nucleus are probably gametocytes, and many of them 

 possess a vacuole. 



Remarks. — Sheather (1919) found the parasite in a buffalo, 

 which died after inoculations made for immunization purposes, 

 and noted that there was a fairly heavy infection, 1*6 percent, 

 of the red corpuscles containing the parasite. Edwards 

 (1925) noted the parasite again. 



Habitat. — Blood of buffalo. Bos bubalus Linn., and of ox, 

 Bos indicus Linn. : United Provinces, Muktesar, Izatnagar. 



SPOK. tr 



