HYALOSPORINA. 95 



fertilization only the nucleus of the male gamete transferred 

 to the female gamete. Gametocysts dehisce by simple rupture. 

 Spores oval, with a surrounding hyaline membrane. 



Remarks. — Characters such as intracellular development, the 

 simple nature of the epimerite, solitary sporonts, and dehiscence 

 of cysts by simple rupture clearly indicate the relationship 

 of the genus with the Stenophoridae. In the trophozoite the 

 nucleus is tethered to the pellicJe by myonemes, in this respect 

 resembling Monodttctits, but the spore has a hyaline membrane 

 round it and is quite unlike that of either Monoductus or 

 Sienophora. On this basis Chakravarti places the genus 

 in a new family, Hyalosporinidse, intermediate between 

 Stenophoridse and Monoductidae. The genus has so many 

 characters in common with the Stenophoridse that I do not 

 consider it necessary to place it in a new family on the basis 

 of the character of the spore alone, especially when we remember 

 that the character of the spore is not known for the majority 

 of the species of Stenophora nor for both the other genera 

 previously referred to the family. 



Key to Indian Species. 



1(2). Sporonts 800-1 1 1 1 /i by 80-1 1 1 /x. Gam- 



etocysts oval, 292-390 fi by 263-375 fj,. [p. 93. 



Sporocysts oval, 8 /x by 6 jti H. cmnbolopsisie Chalk., 



2 (1). Trophozoites 130-173 /li by 37-70^. 



Gametocysts spherical, 96-120 /x in 



diameter. Sporocysts oval, 6-2 /* by [p. 95. 



4-12 ju H. rayi Chak. & Mitra, 



30. Hyalosporina cambolopsisae Chakravarti. (Fig. 32.) 



^Hyalosporina camholopsisse, Chakravarti, 1935, pp. 211—18, pi. vii, 

 figs. 1-19. 



Youngest forms penetrate the epithelial cells, pass beyond 

 the nucleus, and develop intracellular ly. Older forms, measuring 

 43-1 50 ju- by 14-30 /x, are attached to the epithehal cells by 

 an epimerite and grow extracellularly. Epimerite a simple 

 structure, consisting of a darkiy staining collar or ring, which 

 grasps the host-cell, and a tongue-Uke process, which is 

 inserted into the cell. In still older forms very fine root- 

 like processes are seen to arise from the ring and project over 

 the tongue-like elevation. Protomerite small and conical 

 in shape, with its orifice plugged by a darkly staining granule 

 which disappears later, the pellicle becoming thickened in 

 this region. Deutomerite the longest segment and circular 

 in transverse section. Longitudinal epicytal striations more 

 prominent on the deutomerite than on the protomerite ; 

 a very thin homogeneous layer of sarcocyte, and below that 

 a layer of circular myonemes or myocyte to which the nuclear 

 myonemes are tethered. Nucleus spherical, measuring 55 /a 



