APOLOCYSTIS. 59 



or dumbbell-shaped, showing active movements. Para- 

 glycogen grains few. Epicyte thin, without striations. 

 Sarcocyte well developed. Myocyte fibrils dehcate. Endo- 

 plasm excavated by vacuoles. Nucleus generally spherical, 

 sometimes ovoidal, with a single spherical karyosome, placed 

 eccentrically. Gametocysts spherical. Sporocysts and sporo- 

 zoites typical. 



Dimensions. — Trophozoites attain a size up to 220 jx by 

 50 fjL ; gametocysts 80 /i in diameter. 



Habitat. — Seminal vesicles of Pheretima posthuma (L. 

 Vaill.) : Punjab, Lahore ; Bombay, Bombay. 



Genus APOLOCYSTIS Cognetti, 1923. 



Apolocystis, Cognetti, 1923, p. 253 ; 1925, p. 231 ; Reichenow, 

 1929, p. 887 ; Bhatia, 1929, p. 124 ; 1930, p. 158 ; Troisi, 1933, 

 pp. 336-42 ; Calkins, 1933, p. 559. 



Trophozoites spherical, without any marked principal axis, 

 and without polar differentiation, solitary. Sporocysts as 

 in the family. , 



5. Apolocystis matthaii (Bhatia & Setna). (Eig. 7.) 



^Monocystis matthaii, Bhatia & Setna, 1926, pp. 362-4, figs. 1-4, 25-27. 

 Apolocystis matthaii, Bhatia, 1929, p. 124. 



Trophozoites most commonly spherical, sometimes ovoid 

 or kidney-shaped, not covered by hairs. Epicyte thin and 

 not showing any meridional striations. Sarcocyte hyaline 

 and httle developed. Myocyte fibres not distinguishable. 

 Endoplasm very dark, being finely granular, the alveoh 



Fig. 1 .—Apolocystis matthaii (Bh. & Set.). (After Bhat a and Setna.) 



compactly arranged and with large grains of reserve material. 

 Nucleus spherical, with single spherical karyosome, placed 

 eccentrically. Gametocysts elHpsoidal. 



Dimensions. — ^Trophozoites attain a size up to 238 /x ; 

 gametocysts up to 468 /x in their longer diameter. 



