160 ILLINOIS BIOLOGICAL MONOGRAPHS [370 



rite : width deutomerite : : 1 : 1.1. Protomerite pentagonal in lateral 

 optical view, truncate at apex, slight constriction at septum, width equal 

 to length. Deutomerite elongate, cylindrical, tapering in posterior two 

 thirds and ending in a rather blunt point. Nucleus ellipsoidal, with sev- 

 eral karyosomes. Endocyte dense. Epimerite consisting of a long slen- 

 der cylindrical neck, terminating in a slightly dilated papillate ante- 

 rior end, the whole three or four times the length of the protomerite 

 alone. 



Cysts irregularly spherical, surface covered with small indentations 

 and papillae. Spores like those of S. ohlongatus. 



Taken at Paris. Host : Blaps mortisaga. Habitat : Intestine. 



STYLOCEPHALUS BREVIROSTEIS (KoUiker) Watson 



Stylocephalus: Sporonts solitary, stout bodied. Ratio length pro- 

 tomerite : total length : : 1 : 4 ; width protomerite : width deutomerite : : 

 1 : 1.2. Protomerite cylindrical, of nearly equal width throughout, 

 width equal to length, no constriction at septum, corners rounded at an- 

 terior end. Epimerite a small xiphoid conoidal tongue projecting up- 

 ward from center of protomerite, length equal to half that of protome- 

 rite. Deutomerite just below septum a little wider than protomerite, 

 tapering to a rather sharp point. Nucleus spherical, with six to nine 

 small karyosomes. Cyst and spores unknown. 



Taken at , Germany. Host : Hydrophilus sp. larva. Habitat : 



Intestine. 



Kolliker illustrated another figure of this species besides the one 

 copied in figure 118, in which the whole body is less angular in outline 

 (1848, PL 2, Fig. 15) ; the epimerite is a sphere, the protomerite nearly 

 so also, and the deutomerite ellipsoidal with a well rounded posterior ex- 

 tremity. The animal is drawn under abnormal conditions, however, a 

 drop of egg albumen having been used as a medium and the animal left 

 in it for some time. 



Frantzius placed this species where it evidently belongs, in the 

 genus Stylocephalus, then called Stylorhynchus. His definition of the 

 genus is "Einzeln lebend mit russelartigem Kopfanhang." 



