343] STUDIES OX GREGARINES— WATSON 133 



vex upward. Nuclei visible, spherical and large, one in each deuto- 

 merite. Cyst and spores unknown. 



Taken at Berlin and Poitiers. Hosts : Geotrupes sp. and Geotrupes 

 stercorarius (L.). Habitat: Intestine. 



DIDYMOPHYES LEUCKARTI Marshall 



[Figures 59, 60] 



1893 Didijmophycs leuckarti Marshall 1893:41-2 



Didymophyes : Sporonts bi- or tri- associative. Length 280 to 

 1120/1,. Width not given. Ratio length protomerite : total length :: 

 1 : 4 in the association of two ; 1 : 11 in the triple association. Ratio 

 width protomerite : width deutomerite : : 1 : 1.3 to 1:5. Protomerite 

 dome shaped, broadly rounded, twice as wide as high, constriction at 

 septum. Either 2 or 3 deutomerites, attached one behind the other, 

 each nucleated and separated from others by a straight septum and a 

 conspicuous constriction. Deutomerites barrel shaped, but little wider 

 than protomerite, last one tapering and ending in a more or less broadly 

 rounded extremity. Endocyte dense in both protomerite and deuto- 

 merite. Nuclei spherical, containing many small chromatin bodies. 



Cysts spherical, one long spore duct. Spores not known. Hosts: 

 Aphodius prodromus (Brahm.) and A. nitidulus F. Habitat : Intestine. 



The cyst dehiscence as seen by Marshall does iiot coincide with that 

 reported by Leger. The latter mentions simple rupture ; the former de- 

 hiscence by one long spore duct. If the methods described by both au- 

 thors are to be accepted, various species in the same genus must have 

 different modes of dehiscence. 



DIDYMOPHYES MINUTA (Ishii) Watson 



[Figure 71] 



1914 Gregarina minuta Ishii 1914:436-7 



1916 Didymophyes minuta Watson ( This paper) 



Didymophyes: Sporonts elongate. Length 188/a, width 26/*. Ra- 

 tio length protomerite : total length : : 1 : 23 ; width protomerite : width 

 deutomerite : : 1 : 1.5. Protomerite flattened somewhat, twice as wide 

 as high, deep constriction at septum. Deutomerites cylindrical, about 

 equal in length, constriction between the two, posterior end broadly 



