H^MOPROTEUS. 219 



When fully developed the nucleus may be vesicular or compact 

 and linear ; sometimes the pigment may occur near both the 

 poles also. Schizogony takes place in the lung and not in 

 the peripheral blood. It is very similar to schizogony as 

 described in H. columbse. In the intracorpuscular phase the 

 schizonts are small, medium-sized or large, and in the extra- 

 corpuscular phase the " Acton body " shows a single nucleus 

 or, as the result of repeated division, forms a number of nuclei 

 leading to the formation of as many merozoites. 



Remarks. — De Mello and his colleagues referred the parasite 

 to the genus Hsemoproteus, but described schizogony as taking 

 place in "Acton bodies " that have come out of the blood- 

 corpuscle. As, however, they state that schizogony takes place 

 in the lung (presumably in the blood-vessels), it is conceivable 

 that the so-called "Acton bodies " may have been endothelial 

 cells of the blood-vessels that are being carried along in the 

 plasma. The form is consequently retained in the genus 

 Hasmoproteus pending further investigation. 



Habitat. — Blood and smears from the lung of the crow, 

 Corvus levaillanti macrorjiynchus Blanf. & Gates : Ceylon ; 

 PoETFGTJESE India, Nova Goa ; and the Indian house-crow, 

 Corvus splendensYi&m. : India (locahty not cited by Donovan) ; 

 Ceylon ; Portuguese India, Nova Goa. 



153. Hsemoproteus danilewskyi (Grassi & Feletti). (Fig. 108.) 



Haemoproteus (part), Kruse, 1890, p. 359. 



Laverania danilewskyi, Grassi & Feletti, 1890, p. 463. 



Halteridium danilew&kyi, Labbe, 1899, p. 79, fig. 145 ; Minchin, 



1903, pp. 266, 268, 269, 347, 348, 349. 

 ■fHalteridium danilewskyi, Stephens & Christophers, 1904, pp. 319- 



21, fig. 67 ; Castellani & Willey, 1904, pp. 83-4, figs. 7-9. 

 Hsemoproteus danilewskyi, Minchin, 1912, p. 365. 

 'fHcemoproteus danilewskyi, Plimmer, 1912, pp. 416, 417; 1913, 



p. 148; 1914, p. 189; 1915, p. 130 ; 1916, p. 85 ; 1917, p. 32. 

 Hsemoproteus danilewskyi var. tinnunculus, Wasielewski & Wiilker, 



1918, p. 115. 

 Hsemoproteus sp., Wenyon, 1926, p. 1383. 

 Hsem,oproteus danilewskyi, Reichenow, 1929, pp. 975-7, figs. 943-6; 



Coatney, 1936, p. 88. 

 '\ Hsemoproteus sp., de Mello, 1937 a, p. 99. 



Young oval stages of the trophozoite present, though not 

 common. Two kinds of fully developed gametocytes (referred 

 to as trophozoites by the discoverers) present in approxi- 

 mately equal numbers. The female gametocytes are stained 

 distinctly blue with Leishman's stain, leaving a clear tract in 

 the centre, and with pigment granules scattered more or less 

 throughout the cytoplasm. The male gametocytes are shorter 

 and stouter, appearing nearly white or very faintly bluish- 

 white, owing to greater density of cytoplasm, and the pigment 



