122 ILLINOIS BIOLOGICAL MONOGRAPHS [332 



HYALOSPORA AFFINIS Schneider 



[Figure 200] 



1882 Hyalospora affinis Schneider 1882:445-6 



1899 Htjalospora affinis Labbe 1899:14 



Hyalospora: Sporonts biassociative, slender and elongate. Length 

 of cephalonts 300/i. Sporont measurements not given. Ratio length pro- 

 tomerite : total length primite :: 1 : 5 (without epimerite). Ratio width 

 protomerite : width deutomerite : : 1 : 1.8. Endocyte yellow. Epimerite 

 a hyaline knob, present on the primite of an association in the figure 

 given (Fig. 201). Nucleus ellipsoidal, with one or two karyosomes. 



Cysts spherical or subspherical, yellow in color, 60fi in diameter. 

 Spores 8.7 by 6/x. 



Taken at Roscoff, France. Host: MachUus cylindrica E. Creoff. 

 Habitat : Intestine. 



Schneider's figure is a paradox. It shows an association, the pri- 

 mite of which is a cephalont, with an epimerite. This condition is al- 

 most unique in the historj^ of gregarines, for it is an unwritten law that 

 only sporonts couple themselves together. I have, however, seen the 

 phenomenon in one instance in the genus Gregarina. 



GAMOCYSTIS TENAX Schneider 



[Figure 201] 



1875 Gamocystis tenax . Schneider . 1875:586-7 



1899 Gamocysiis tenax Labbe 1899 :12 



1913 Gamocystis tenax Ellis 1913b :271 



Gamocystis: Sporonts biassociative, in apposition, head to head; 

 obese. No protomerite in the sporonts. Body ovoidal to subconical, pos- 

 terior extremity rounded, nucleus spherical with one karyosome. En- 

 docyte with large irregular granules. Cysts spherical, sporulation par- 

 tial, spore ducts 15 or more in number, short, extending only into the 

 thick transparent layer of the cyst. Spores elongate cylindrical, 

 rounded at the ends. 



Taken at Roscoff, France. Hosts : Blattella lappanica (Ectobia lap- 

 panica (L.) ; Blaita lappanica). Habitat: Intestine. 



