263] 



STUDIES ON GREGARINES— WATSON 



53 



STENOPHORA JULIPUSILLI (Labbe) Crawley 



[Figure 6] 



Stenophora: Sporonts solitary, elongate, rather stout. Maximum 

 length 400/i,, maximum width not given. Ratio length protomerite : 

 total length : : 1 : 9 in adults ; ratio width protomerite : width deuto- 

 merite : : 1 : 1.5. Shape protomerite conical with a rather sharp apex, 

 widest below median portion, papilla with an apparent pore at anterior 

 end, deep constriction at septum. Slightly broader than high. Deutome- 

 rite irregularly cylindrical, four times as long as broad, sometimes widest 

 through middle, sometimes posterior to middle. Endocyte very dense in 

 adults. Granules of protomerite different from those of protomerite. 

 Nucleus spherical and large, attaining half the width of deutomerite. 

 Contains a large karyosome. Cyst and spores unknown. 



Taken at Philadelphia, Pa. Hosts Julus sp. and Parajulus sp. Habi- 

 tat : Intestine. 



This parasite was found and described by Leidy as Gregarina juli- 

 pusilli. Both figures he gives appear to be those of immature specimens 

 (see Fig. 5). From Leidy 's data alone, I should consider the species 

 invalid. 



Crawley (1903:51) includes both G. juli pusilli and G. juli margi- 

 nati with the classic Stenophora juli Frantzius under the name of the 

 latter. That this determination was erroneous Crawley later discovered 

 and (1903a :634-5) he separated the three species: 



"This species is easily separated from S. juli by the size of the protomerite. 

 In S. juli the length of the protomerite, according to the figures given by Schnei- 

 der (1875) makes up only about 6% of the total length. In S. iulipusilli this 

 proportion increases to 10% in the adults and 15% in the young." 



Stenophora julimarginati therefore stands as a separate, well de- 

 fined species; the species described as Gregarina juli pusilli Leidy was 

 renamed by Crawley as Stetiophora julipusilli (Leidy). Crawley's 

 words concerning the confusion of names are as follows : 



"There is a good deal of confusion regarding the gregarines occurring in 

 the Diplopod family Julidae. These gregarines all bear a certain amount of 



