122 ILLINOIS BIOLOGICAL MONOGRAPHS [332 



HYALOSPORA AFFINIS Schneider 

 [Figure 200] 



1882 Hyalospora affinis Schneider 1882:445-6 



1899 Hyalospora affinis Labbe 1899:14 



Hyalospora : Sporonts biassociative, slender and elongate. Length 

 of cephalonts 300^. 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, 60/A in diameter. 

 Spores 8.7 by 6/*. 



Taken at Roscoff, France. Host: Machilus cylindrica E. Geoff. 

 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 history 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 Gamocystis 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 lapponica (Ectobia lap- 

 ponica (L.) ; Blatta lapponica). Habitat: Intestine. 



