90 ILLINOIS BIOLOGICAL MONOGRAPHS [300 



ACTINOCEPHALUS STRIATIUS Leger and Duboscq 



[Figure 37] 



1903 Actinocephalus striatus Leger and Duboscq 1903a :334-5 



Actinocephalus : Sporonts solitary, minute. Length 30-35/1. 

 Width not given. Ratio length protomerite : total length : : 1 : 4 ; width 

 protomerite : width deutomerite : : 1 :.7. Protomerite wider than deuto- 

 merite, dome shaped, broadly rounded in front with a small flattened cir- 

 cular papilla surrounded by a circle of small teeth. Constriction at sep- 

 tum, which is curved upward. Deutomerite irregularly cylindrical, term- 

 inating in a sharp cone. Epicj^te marked with very apparent longitudinal 

 striations, from whence the name. Nucleus ovoidal with its longitudinal 

 axis perpendicular to that of the body. Cyst and spores unknown. 



Taken in Provence, France. Host: Scolopendra cingulata La- 

 trielle. Habitat: Intestine. 



This gregarine is placed in the genus Actinocephalus from the 

 character of the dentate papilla of the protomerite. 



" au sommet du protomerite fait saillie un petit bouton aplati, a bord regu- 



liM-ement festonne, comme dentele, au centre dupuel s'eleve un rostre mobile asset 

 droit. C'est la I'epimerite qui, comme on le voit, presente de grandes analogies 

 avec celui des Actinocephalus." 



ACTINOCEPHALUS DUJARDINI Schneider 



[Figures 38, 39, 40] 



1875 Actinocephalus dujardini Schneider 1875 :589-90 



Actinocephalus: Sporonts solitary, rather obese. Length and 

 width not given. Ratio length protomerite : total length : : 1 : 2.4 ; 

 width protomerite : width deutomerite : : 1 :1. Protomerite very large, 

 cylindrical, longer than wide, nearly one third total length of sporont, 

 terminating in a truncated cone, the apical region being hyaline, slight 

 constriction at septum. Deutomerite widest just behind the septum and 

 tapering gradually to a sharp point. Endocyte of equal density in pro- 

 tomerite and deutomerite. Epimerite a globose sessile body resting on 

 the apex of the protomerite, drawn out in its apical region to a short 

 neck upon which is set a flat corona of 16 to 20 backwardly directed 

 rigid spines. Nucleus small, spherical. Cyst and spores not known. 



Taken at Paris, France. Host : Lithobius forficatus Linn. (L. for- 

 cipatus). Habitat: Intestine. 



Crawley (1903:55) records finding this little gregarine several 

 times in L. forficatus. He gives no drawings and does not state where 

 it was taken. 



