64 ILLINOIS BIOLOGICAL MONOGRAPHS [274 



ready assumed their adult form, and have attributed the difference 

 to a difference merely in the amount of nourishment they have received. 

 T think if we are to assume that there is a sexual dimorphism, we must 

 look for two individuals of somewhere nearly the same size rather than 

 one six times the size of the other. 



While sexual dimorphism is a factor to be looked for among grega- 

 rines, it has never been definitely proven for a single species. There may 

 be a difference in sexes among the sporonts, but if so, this difference 

 seems to be of a chemical nature or of such slight morphological signifi- 

 cance as to have been generally overlooked; and it should be evident 

 among all or most of the members of the same family rather than con- 

 fined to a few species only. 



STENOPHORA PRODUCTA Leger and Duboscq 

 [Figure 18] 



1903 Stenophora iuli Leger and Duboscq 1903a -.315 



1904 Stenophora producta Leger and Duboscq 1904:375-7 



Stenophora: Sporonts solitary, very elongate. Sporonts 1000/x 

 long, width not given. Ratio length protomerite : total length :: 

 1 : 20 ; ratio width protermite : width deutomerite : : 1 : 21. Proto- 

 merite globular, slightly flattened top and bottom, sometimes slightly in- 

 vaginated at the deutomerite. At apex a small papilla with an apparent 

 pore. Deutomerite very long, cylindrical, broadly rounded behind. En- 

 docyte of protomerite finely granular, staining deeper than the deuto- 

 merite. The nucleus ellipsoidal, with one large karyosome. An inverted 

 xiphoid cone rounded at the summit, projecting from the septum down- 

 ward into the deutomerite and consisting of homogeneous protoplasm 

 staining deeper than that of the deutomerite. Probably consisting of 

 nutriment manufactured by the protomerite and filtered through the sep- 

 tum, to be eventually diffused through the deutomerite. Epimerite a 

 small knob. Cysts spherical, size not given. Spores ovoidal, 5/x long. 



Taken at Corte, Corsica. Host: Julus varius Fabricus (Parajulus 

 yanwsFab.). Habitat: Intestine. 



The reason for the confusion of names mentioned above appears in 

 the following quotation from Leger and Duboscq (1904:375) : 



"Nous avons deja signale la presence de cette Gregarine dans 1'intestin de 

 Pachyiulus varius Fab. de la Corse (1903) et nous 1'avons tout d'abord confondue 

 avec Stenophora iuli, ne 1'ayant observee a cette epoque que sur le vivant. Depuis 

 une etude plus approfondie sur des preparations colorees nous a convaincu qu'il 

 s'agit d'une especee morphologiquement differente de Stenophora iuli (Frantzius) 



