34 ILUNOIS BIOLOGICAL MONOGRAPHS [34 



L^ger and Duboscq (1911) have described a new species, Cephaloido- 

 phora maculata, from Gammarus marinus which is identical with the aber- 

 rant species referred to above. 



Family GREGARINIDAE Labbe 1899:9 



Epimerite symmetrical, simple. Sporonts solitary or in association. 

 Cysts with or without spore-ducts, spores symmetrical. 



Genus URADIOPHORA Mercier 1912a 



Intestinal parasites. Development extracellular. Epimerite an 

 elongate papilla. Cysts without sporeducts. Spores spherical or sub- 

 spherical, not united in chains, faint equatorial line. End portion of deuto- 

 merite of satellite greatly constricted. Associations of two sporonts. 



URADIOPHORA CUENOTI (Mercier) Mercier Type Species 

 [Figure 63] 



1911 CephaloidophoraCuenoti 



1911 Cephaloidophora Cuenoti 



1912 Uradiophora Cuenoti 

 1912 Uradiophora Cuenoti 



1912 Uradiophora Cuenoti 



1913 Uradiophora Cuenoti 



Characters of the genus. Syzygies of two sporonts, infrequently of 

 three. Sporonts very elongate, cylindrical. Ratio LP:TL::1:20 

 (primite) 1 : 28 (satellite without appendage). WP: WD:: 1:1.9 to 

 1 : 2. Sporonts 700/x in max. length. Nucleus sub-spherical. Epimer- 

 ite an elongate papilla, persistent in sporonts. Deutomerite with small 

 atrophied appendix. Nucleus in adults spherical, with one large karyo- 

 some; chromidial bodies frequently found in both protomerite and deu- 

 tomerite. Cysts ovoidal, 38 to 44/i in diam. Spores 4n in diam. 



Intestine of Atya'ephyra Desmaresti Millet. 



Taken at Nancy, France. 



Genus PYXINOIDES Tregouboff 1912 



Intestinal parasites, extracellular in development. Epimerite a short 

 stype dilated in middle to form a globe with sixteen longitudinal grooves, 

 the free upper end of the style being about 2/i in length. Septum with 

 small disc-shaped horizontal swelling in middle. Sporont ovoidal, nucleus 

 large, one karyosome. Syzygies of two sporonts, the primite always 

 larger. Cyst and spores unknown. 



