§6 SPOROZOA. 



and triangular in shape, with a darkly staining dot or special 

 type of granules. Deutomerite broader anteriorly, gradually 

 tapering posteriorly, packed with granules. Nucleus spherical, 

 with a central karyosome in the young forms, oval in the adult, 

 tethered to the pelHcle by two sets of myoneme fibres. Game- 

 tocysts spherical, rupturing by simple dehiscence. Sporocysts 

 elongate oval, with an outer hyaline coat which is prominent 

 at both poles. On one side of the spore there is a circular Hd^ 

 like structure which stains deep brown with Lugol's solution. 



Dimensions. — Trophozoites 130-173 /x by 37-70ju. ; gameto- 

 cysts 77-116-5 fx in diameter ; sporocysts 6-2 /x by 4-12 fi. 



Habitat. — Alimentary canal of the MiUipedes Polydesmus sp. 

 and Strongylosoma contortipes Attems : Bengal, Calcutta. 



2. Family GREGARINID^ Labbe, 1899. 



{Syn. Clepsidrestid^ Leger, 1892.) 



Epimerite symmetrical, simple. Sporonts solitary or in 

 associations up to 12. Development extracellular, Gameto- 

 cysts with or without sporoducts, sporocysts syrametrical. 

 Confined mostly to insects. 



Kamm (1922) enumerates eleven genera as belonging 

 to this family, and others have been described since. Only 

 five genera are known from India. 



Key to Indian Genera. 



1 (3). Sporonts solitary 2. 



2. Epimerite a simple, sessile knob. Dehis- 

 cence by spore-ducts. Sporocysts [p. 97. 

 barrel-shaped, in chains Leidyana Watson, 



3 (1). Sporonts in associations of 2 or more 



individuals 4. 



4(7). Sporonts associated in pairs 5. 



5(6). Epimerite a simple globular or cylindrical 

 papilla. Dehiscence by spore-ducts. 



Sporocysts barrel-shaped or cylindri- [p. 98. 



cal, in chains Gregabina Dufour, 



6 (5). Satellite with a septum. Epimerite 



dilated anteriorly like a cauliflower 



and narrower at the base. Dehiscence 



by simple rupture. Sporocysts ovoidal [& Set., p. 102. 



or spherical CAtiLOCEPHALUS Bh. 



7 (4). Sporonts in associations of 2 to several 



individuals 8. 



8 (9). Sporonts attenuate, often attached 



laterally. Gametocysts not known. 



Sporocysts barrel-shaped, with a spine [Pinto, p. 103. 



at each corner Pbotomagalh^nsia 



9 (8). Sporonts in associations of 2 to 12 or 



more. EpuTierite a small cylindrical 

 papilla. Gametocysts spherical, de- 

 hisce by simple rupture. Sporocysts [p. 105. 

 ovoidal HiEMOCYSTis Leger, 



