54 SPOEOZOA. 



1. Legion HAPLOCYTA Lankester, 1885 



(=AcEPHALrN"A Koelliker or Monocystidea Stein+Lecudi- 

 nidee and other primarily Dicystid forms). 



The Efgrbgabinaeia are usually divided into Acephatjna 

 and Cephalina on the basis of the absence or presence of 

 an epimerite. Hesse (1909), Bhatia (1924), and Cognetti 

 (1921, 1925, and 1926) have shown that a fairly large number 

 of Monocystids also possess an organ of attachment or epimerite. 

 An epimerite is also present in the family Lecudinidse (=Dolio- 

 cystidse), but the body is not divided into a protomerite and 

 a deutomerite. Brasil (1908 and 1909) discussed the relation- 

 ship of DoUocystis with Lankesteria and other admittedly 

 Monocystid forms. Minchin (1903) considered it piu-ely 

 a matter of definition whether Doliocystidee should be considered 

 as Cephalina Avithout a septum, or as Monocystidea with 

 an epimerite. I have elsewhere (1924, p. 508) discussed the 

 grounds for classifying the Eugregarinakia into Haplocyta 

 and Septata, and for placing the DoHocystidse under the 

 former. 



The legion Haplocyta may be divided into two tribes, 

 as follows : — 



1. Producing sporocysts with similar poles. 



Generally ccelomic parasites of Oligo- [p. 54. 



chsetes Homopolaridea Bhatia, 



2. Producing sporocysts with dissunilar poles. 



Intestinal or ccelomic parasites, usually of [Bhatia, p. 82. 



marine animals Heteropolaridea 



1. Tribe HOMOPOLARIDEA Bhatia, 1930 



(^Family Homopolarid^ Dogiel). 



Sporocysts with similar poles. Generally ccelomic parasites 

 of terrestrial Oligochsetes. The tribe comprises eight famiHes 

 {vide Bhatia, 1930), of which representatives of six are at 

 present known from India. 



Identification Table of Families. 



1 (12). Sporocysts biconical, with similar, non- 



appendiculate poles, octozoic 2. 



2 (11). Sporocysts not provided with spines at 



either extremity 3. 



3 ( 10). Trophozoite simple 4. 



4 (9). Trophozoite solitary 5. [Bhatia, p. 55. 



5 (6). Trophozoite without any differentiation [Stein, emend. 



at the anterior end Monocystidae 



6 (5). Trophozoite with a differentiation at the 



anterior end 7. 



7 (8). Trophozoite with a conical or cylindro- [Bhatia, p. 65. 



conical trunk at the anterior end Bhynchocystidse 



