1903.] NATURAL SCIEXCES OF PHILADELPHIA. 51 



Host: Lucaniis dama . 



Locality: Swarthmore, Pa. 



The gregarines occurred either singly or associated in pairs. 



Stenophora juli Frantzius. 



Gregarinajuli Frantzius (1848), p. 194, Taf. 7 fig x 1-2 

 Gregranria iaruateLeidy (1848-49), p. 232. ' *' ' 

 Gregarinajuli-viarginatil.eidy{li5i),Y>.'2Z7,V\ 10 figs l-'^O 

 Gregranm;«Zf-jOim<ZZiLeidy (1853),p.238, PI 10 figs 21-22' ' 

 Stenocephalus -juli Schneider (1875), p. 584, PI. 20, figs. 29-33. 



The best figures extant of this gregarine are those pubhshed by Leidy 

 m 1853. His fig. 17 is especially good in showing the apparent orifice 

 through the thickened epicyte of the anterior part of the protomerite 

 The contortions displayed by the gregarine are also portrayed in an 

 admirable manner. 



This species lives in the intestine of Julus and the smaller species of 

 Para]ulus. It is extremely common, occurring in at least 90 per cent 

 of the hosts examined, usually in moderate numbers, from forty to fifty 

 or thereabouts, but frequently only a very few are present. All stages 

 from the smallest intracellular forms to the largest sporonts, may^e 

 found at any season of the year, but cysts are very rarely seen. ' 



Stenophora juli continues as a cell parasite until it has reached a 

 length of perhaps 100 microns. The cephalont stage is probably 

 omitted. Leidy gives the maximum size as one-thirtieth of an inch 

 which is nearly a millimeter, but I have never seen the species longer 

 than 400 microns. 



Stenophora spiroboli sp. u. Pl. ii, flg. 22. 



Epimerite: Not seen. 



Protomerite: Very small, narrower than the deutomerite and much 

 compressed from before backward. 



blimtr"^'''^'"' ^^^^"''^"'^^'^^P^""g ^'"-'^ ^'^^y little and terminating: 



Epicyte: Very distinct; about !{ microns thick. Longitudinal stri- 

 ations easily seen. 



Sarcocijte: Well developed; about 2 microns thick over most of the 

 animal, but attaining twice this thickness at the posterior end. 



Entocyte: Opaque in both protomerite and deutomerite. 



Nucleus: Not seen. 



Dimensions: Maximum length 1,000 microns. 



Movements: While progression was slight, the animals showed con- 

 stant muscular movements. In some cases they bent themselves into 

 the shape of the letter U, in others merely the anterior end was bent 



