267] STUDIES ON GREGARINES— WATSON 57 



Labbe (1899:15) unites under the name S. juli (Frantz.) Schn. all 

 of the following : 



1848 Gregarina juli Frantzius 



1875 Stenocephalus juli Schneider 



1851 Gregarina larvata Leidy 



1853 Gregarina juli marginati Leidy 



1880 Gregarina paradoxa Gabriel 



Why Labbe regards them all as synonymous, he does not state. They 

 appear to be alike only in that they are all parasites of the same diplopod, 

 Julus. With the exclusion of the last three*, the species stands as con- 

 taining the original G. juli Frantz. and Stenocephalus juli Schn. The 

 ratios obtained from figures given by Frantzius and Schneider are almost 

 identical. Neither author gives any dimensions, so the animals may 

 agree not at all in actual size. The character of the endoplasm, its granu- 

 lar content and color, may differ considerably. 



Leger and Duboscq give a detailed account of the various species 

 which have been confused in the literature. For the entire quotation, see 

 under the heading Stenophora larvata (Leidy) Ellis. 



From a lack of positive evidence to the contrary, the two species 

 Gregarina juli Frantz. and Stenocephalus juli Schn. stand as a single 

 species, now called Stenophora juli (Frantzius) Schneider. 



Leger and Duboscq (1904:363-8) described a parasite as Stenophora 

 juli and considered it synonymous with the S. juli above. The animal 

 which they described differs greatly from the classic S. juli in shape of 

 all its parts, in its proportions, the density of its endoplasm, and in the 

 shape of its nucleus ( ! ) . A detailed consideration of these factors is 

 taken up under Stenophora dauphinia. 



STENOPHORA DAUPHINIA Watson 



[Figure 9] 



1904 Stenophora juli Leger and Duboscq 1904:363-8 



1916 Stenophora dauphinia Watson (This paper) 



Stenophora : Sporonts solitary, elongate. Total length 250 to 300/x. 

 Width 19fji. Ratio length protomerite : total length : : 1 :10 ; width 

 protomerite : : 1 : 0.9. Protomerite dilated in posterior two-thirds, 

 separated from anterior part by a deep circular constriction. Apex 

 broadly conical, papillate anterior end, with an apparent pore. Deuto- 

 merite cylindrical, attaining ten times the length of the protomerite. 



*The third and fourth are synonymous being now S. larvata; the fifth is 

 synonymous with S. juli. 



