272 Sporozoa 



Fig. 6. 1. Variations in body form of Gregarinida. A. Taeniocystis mira, 

 resembling a cestode strobila; mature form (length reaches 400-500^) with- 

 out epimerite; the anterior "segment" is the protomerite (after L^ger). B. 

 Nematocystis anguillula, slender species reachin;^ a length of 500;^ (after 

 Berlin). C. Apolocystis minuta, approximately sp^^erical mature form, x930 

 (after Troisi). D. Schaudinella henleae, illustrating the spindle-shaped body 

 common among gregarines; x975 (after Nusbaum). E. Corycella armata, a 

 typical cephaline gregarine with barbed epimerite; mature forms reach 300jn 

 in length (after Leger). F. Aikinetocystis singularis, in which the anterior 

 part of the body is dichotomously branched, each tip ending in a "sucker"; 

 tips of two branches shown; schematic, x400 approx. (after Gates). G. 

 Cross-section of Polyrhabdina spionis at level of nucleus; note heavily ridged 

 cuticle; x900 (after Mackinnon and Ray). H. Section through body wall of 

 Rhynchocystis porrecta showing cuticle, sarcocyte, myocyte, and portion of 

 the endoplasm with paraglycogen bodies; xl200 (after Troisi). 



(Fig. 1. 13, D, E), both longitudinal and circular myonemes have been 

 described, but only longitudinal ones have been seen in R. pilosa (133). 

 The endoplasm, which contains the large nucleus, is rather homogeneous 

 except for the frequent appearance of many paraglycogen granules (Fig. 

 6. 1, C) measuring 2-7[jl in diameter in different species (34). 



