9 



Average individuals 140 u to 180 ;i. 



Hosts, Paraiulus venustus "Wood and Orthomorplta gracilis 

 (Koch), Diplopoda. 



Habitat, any portion of the posterior two-thirds of the alimentary 

 canal. 



Length of the protomerite 7 to 8, greatest width of protomerite 4 

 to 5,25 in the length of the deutomerite; greatest width of the deuto- 

 merite 2 to 2,25 in the total length of the gregarine. 



Protomerite small, dome-shaped or conical, widest at its junction 

 with the deutomerite, evenly joined to the deutomerite so as to appear 

 almost as a continuation of the deutomerite, often with a slight con- 

 cavity in the extreme apical portion. 



Deutomerite large and rather regularly oval , region of greatest 

 width approximately equidistant from the anterior end of the protomerite 

 and the posterior end of the deutomerite; septum distinct, either straight 

 or slightly concave on the side of the protomerite. 



A 



Fig. 1A. Drawn from a cleared and mounted specimen. Shaded area in the apical 

 portion of the protomerite indicates the extent of the expanded sarcocyte. The ap- 

 parent pore in the epicyte is in the center of this area. Length, 143 u. 



Nucleus spherical, faintly visible or obscured in living specimens 

 very distinct in cleared specimens, often with one or more karyosomes. 



Epicyte thin and rather firm, with an apparent pore in the apical 

 region of the protomerite. 



Sarcocyte distinct over the entire animal, of rather uniform thick- 

 ness throughout, (being about three times as thick as the epicyte), except 

 at the apex of the protomerite where it fills a shallow, conical space 

 which extends away from the apex. 



Endocyte fairly clear in all parts of the gregarine, but especially 

 so in the protomerite. 



Cysts spherical, composed of a densely granular central mass co- 

 vered by a clear layer. Average total diameter 114 /«, granular portion 

 84 », clear portion 30 it. 



None of the gregarines of this species were observed to bend the 

 body in any direction and the form was never changed. They were al- 

 ways of a very constant shape, and solitary. 



