30 SPOROZOA. 



Remarhs. — Infection is very rare. The young trophozoite 

 within the blastophore has no spine-like structures. The 

 adult trophozoite lives free in the seminal vesicles and possesses 

 the spines : it has a dark aspect in the living condition on 

 account of reserve of paraglycogen granules, and shows slow 

 movements. Form of the adult is like a globe drawn out 

 along one axis. The spine-like structures taper gradually 

 towards the distal end, and consist of a non-granular endo- 

 plasm covered by sarcocyte and epicyte, thus resembling in 

 structure the trunk-like epimerite of Rhynchocystis : they 

 disappear during association. Nucleus large, slightly elongate 

 and oval, generally situated near the middle of the body, 

 and may attain a length of 24b fx : it contains a single large 

 central karyosome. Sporocysts, doubtfully belonging to this 

 species, were unusually large, measuring 28 fi by 14 /x, and 

 one of the sporocysts contained only two sporozoites. 



Habitat. — Seminal vesicles of Pheretima posthuma (L. Vaill.) : 

 Punjab, Lahore ; Bombay, Bombay. Seminal vesicles of 

 Eutyphoeus sp. : United Provinces, Lucknow. 



Genus GRAYALLIA Setna, 1927. 



Grayallia, Setna, 1927, pp. 335-7 ; Bhatia, 1929, p. 126 ; 1930 

 p. 165 ; Reichenow, 1929, p. 887. 



Monocystid with four spines at either end. The spine-like 

 prolongations arise from the surface of the body at a httle 

 distance from the extremities ; they are broader at the base 

 than at the apex and are subequal. 



21. Grayallia quadrispina Setna. (Fig. 29.) 



■\Grayallia quadrispina, Setna, 1927, pp. 335-7, figs. 1-3. 



The trophozoite resembles Nematocystis in form, with 

 four spine-like processes arising from the surface of the body 



Fig. 29. — Grayallia quadrispina Setna. s, one of the spines. 

 (After Setna.) 



at either end and radiating backwards. Body chalky-white 

 in colour and highly deformable. Nucleus large and oval, 



