THELOHANIA. 



357 



nuclei arranged in pairs (fig. 116, A, B). They divide finally 

 into two to four binucleate schizonts (C). The two nuclei 

 become enlarged and closely associated, and ultimately fuse 

 into one, thus forming a sporont (D-F). The sporont-nucleus 

 undergoes three successive divisions, producing eight sporo- 

 blasts. In each sporoblast the nucleus divides into two 

 masses. One of them remains as a single nucleus of the 

 sporoplasm, while the other disintegrates and produces the 

 polar filament. The unstained spores are elhpsoidal, with 

 equally rounded extremities ; the spore-membrane is moderately 

 thick, and there is no indication of its being composed of two 

 valves ; the contents are irregularly vacuolated. The stained 

 spore shows a comparatively large nucleus at one end and 

 a deeply stained polar capsule near the other. 



Dimensions. — Spores measure 4-5-2/^ by 2-4-2-8ju,. 



Habitat. — Adipose tissue cells of the larvae of Anopheles 

 hyrcanus (Giles) : Bengal. 



297. Thelohania legeri Hesse. (Fig. 177.) 



Thelohania legeri, Hesse, 1904 a, pp. 570-1, 1904 6, pp. 571-2, 



10 text-figs. 

 Thelohania illinoisensis. Kudo, 1921, pp. 167-71, 177 ; 1922, 



pp. 74-5. 

 Thelohania legeri. Kudo, 1924a, pp. 147-62, 1 pi., 9 text-figs.; 



1924 c, pp. 143-6, figs. 499-507, 694-727, 764, text-fig. H ; 



Wenyon, 1926, p. 748. 

 ■\Thelohania sp., Iyengar, 1929, p. 138. 

 \Thelohania legeri. Kudo, 1929, pp. 2-3, figs. 1-18. 

 Thelohania legeri, Reichenow, 1929, pp. 1086, 1104; Kudo, 1931, 



p. 321, fig. 138, a-/; Calkins, 1933, p. 554, fig. 223. 



The earhest stages are unknown. The youngest stages 

 found in the infected cells of the " fat-body " of the host are 

 rounded bodies Avith compact chromatin granules (fig. 177, A). 

 The nucleus becomes vesicular and then divides ; the cytoplasm 

 becomes constricted and two uninucleated daughter-schizonts 

 are formed {B). This division is repeated. Some of the 

 binucleate schizonts do not spht, but grow into large elongate 

 bodies with four nuclei (C). Each of these divides into two 

 large binucleate schizonts. These nuclei lose their vesicular 

 nature, become compact, and divide, the daughter halves 

 remaining connected with each other by a strand. By further 

 division two binucleate forms are formed, the nuclei in each 

 being cousin nuclei and not daughter nuclei (D). Sometimes 

 octonucleate schizonts occur, which by division produce 

 four binucleate schizonts. The zygote or sporont is formed 

 by the fusion of the two nuclei (E). The nucleus of the zygote 

 divides three times in succession, resulting in stages with two 

 (F), four (G), and eight nuclei (H). The sporont is then 

 transformed into a pansporoblast with eight sporoblasts, 



