254 



SPOROZOA. 



Proteosoma grassii, Labbe, 1894, p. 157, pi. ix, figs. 1-31. 

 '\Prot60soma sp., Ross, 1898, pp. 401-8, 448-50 ; 1899 a, pp. 1-3 ; 



1899 b, pp. 136-44 ; Daniels, 1899, pp. 443-54. 

 Heemproteus danilewskyi, Labbe, 1899, p. 80, fig. 146. 

 Proteosoma sp., Schaudlnn, 1900, pp. 159-81 ; Grassi, 1900, 



pp. 115-24 ; Ruge, 1901, pp. 187-91, 2 figs. ; Hartmann, 1907, 



pp. 148, 149, 152. 

 Plasmodium praecox, Minchin, 1912, p. 358. 

 Plasmodium, relictum, Minchin, 1912, p. 358. 



Proteosoma prsecox, Doflein, 1916, pp. 897-901, figs. 896-900, 903. 

 ^Proteosoma prsecox, de Mello, de Sa, de Sousa, Dias, & Noronha, 



1917, p. 15. 

 ■\Plasmodium danilewskyi, Castellani & Chalmers, 1919, p. 513. 

 Proteosoma praecox, Calkins, 1926, p. 444. 

 ^Plasmodium prsecox, Scott, 1926, p. 237 ; Wenyon, 1926, pp. 1365, 



1385. 

 Plasmodium prsecox, Wenyon, 1926, pp. 977-8, pi. vi, figs. 1-10 ; 



Hegner, 1926, pp. 479-80 ; Hartmann, 1927, pp. 1-7, pis. i, ii ; 



Knowles, 1928, pp. 442-3, fig. 102, 1-i ; Hegner, 1929, pp. 59- 



82. 

 Proteosoma prsecox, Reichenow, 1929, pp. 983-4, figs. 952-4, 1000. 

 Plasmodium prsecox, Manwell, 1930, pp. 382-3 ; Kudo, 1931, 



p. 287, fig. 122 a-d. 

 Plasrnodium relictum, Ed. & Et. Sergent & Catanei, 1930, pp. 223- 



38 ; 1931 a, pp. 399-437 ; 1931 h , pp. 327-35. 

 Plasmodium prsecox, Giovannola, 1934, pp. 372—8, pi. i, figs. 1—4 ; 



Coatney & Roudabush, 1936, p. 340 ; de Mello, 1937 a, p. 95. 



Schizogony takes place in the red blood-corpuscles, generally 

 in the viscera. Young trophozoites resemble the small rings 



A JB 



Fig. 132. — Proteosoma prsecox {(jTassi &, Yeletti). (x2000.) J., young 

 ring-shaped trophozoite ; B, G, larger trophozoites ; 

 D, schizont splitting into a number of merozoites ; E, female 

 gametocyte ; F, male gametocyte. (After Wenyon.) 



of Laverania malarise. As growth proceeds, dark pigment 

 granules appear, and the host- cell becomes distorted, its 

 nucleus becoming displaced more or less to one side or to 

 one end of the cell (unlike Hsemoproteus, which develops in 

 the red blood- corpuscle without deforming it or displacing 

 the nucleus to any extent). Schizont varies in size and 

 period of growth. Small schizonts measure 4-5 /x, and 

 produce only about six merozoites. Largest schizonts occupy 

 about half the corpuscle and produce 16 to 24 merozoites. 



