303] STUDIES ON GREGARINES— WATSON 93 



seen, was a balloon-shaped sac, 350^ long by 200 broad. The epicyte and sarco- 

 cyte were each nearly or quite ifi thick, and the former was plainly marked with 

 longitudinal striations. Both of the individuals were very flexible, readily chang- 

 ing shape and showing extensive contortions. After having been upon the slide 

 for perhaps an hour, the parasites became quiescent and assumed what was prob- 

 ably something like the typical shape. The larger then measured 825^14 long by 120 

 broad. The anterior end, as shown in figure 19, was much narrower than the bal- 

 ance of the animal, but it is somewhat questionable if this narrowing is perma- 

 nent. A distinct septum extended across this narrower region, cutting off a portion 

 of granular entocyte. Backward from the broadest portion, the animal's body ta- 

 pered gradually, ending behind in a point. This species is placed in the genus 

 Hoplorhynchus on account of its close resemblance to H. actinotus Leidy and its 

 occurrence in a centipede related to Scolopocryptops, the host of the latter." 



Its position is doubtful from insufficient evidence and will not re- 

 main authentic unless corroborated and described in more detail by 

 some future worker. 



Ellis included this species with H. actinotus under the name Am- 

 phorocephalus actinotus (Leidy). I have referred the species to the 

 original position. The protomerite does not have the constriction neces- 

 sary to place it in the genus Amphorocephalus, 



SPECIES OF UNCERTAIN DETERMINATION 



TRICHORHYNCHUS LITHOBII Crawley 



[Figure 44] 



Crawley's statement (1903a :637) concerning this species is as fol- 

 lows: 



"This animal, which is apparently specifically distinct from any other gregarine 

 parasitic in Lithobius, was found in a specimen of that centipede from Raleigh, N. 

 C. An epimerite was not found. The protomerite was subcordiform, and displayed 

 in front a differentiation the exact nature of which could not be determined. The 

 deutomerite varied considerably in shape, the animal being quite polymorphic. Both 

 epicyte and sarcocyte were distinct and of about equal thickness. The septum was 

 thick and curved backward. The-'Cndocyte was not dense; the nucleus large, with 

 several karyosomes. The largest individual seen was igSfi long." 



There seems to be no basis for placing the parasite in the named genus. 

 None of the characteristics of the genus are named above, the elongate 

 epimerite, ovoidal cysts which dehisce by pseudocyst, cylindrical spores. 

 Enough data are lacking so that the species cannot be definitely placed 

 in any genus. 



