136 ILLINOIS BIOLOGICAL MONOGRAPHS [346 



of the new genus Stephanophora does not differ from Stein's genus Ac- 

 tinocephalus. Leger's words are as follows: 



"Appareil de fixation - - constitute par un plateau epais borde d'une couronne 

 de tentacules globuleux. 



Gregarines toujours solitaires, fixees pendant la plus grande partie de leur ex- 

 istence ; . 



Kystes spheriques dehiscents par simple rupture . Spores cylindro-bi- 



coniques." 



Stein's diagnosis of the genus is as follows: 



Die andre Form des Haftapparates ensteht dadurch, dass sich der Kopf nach 

 vorn in einen kurzen Stiel verengert, der sich in eine flache, runde, am Rande 

 gekerbte, auf dem Stiel senkrecht stehende Schiebe erweitert. [My Fig. 75]. Die 

 vordere, zum Anheften dienende Flache der Schiebe ist in der Mitte in einer, dem 

 Durchmesser des Stiels gleichkommenden Ausdehnung glatt, von diesem glatten 

 Centrum aus aber bis zur Peripherie sehr regelmassig strahlenformig in Falten 

 gelegt. Jede Einfaltungsfurche fallt einer Einkerbung des Seheibenrandes zusam- 

 men. Ich vereinige die mit einem solchem Haftapparat versehenen Formen zu der 

 Gattung Actinocephalus." 



The two descriptions are thus synonymous and but one species is 

 involved, as well as but one genus, the epimerite being stalked, with 

 digitiform processes radiating from a flat central plate. In Stein's draw- 

 ing the processes turn backwards, in Leger's they point directly for- 

 ward, but this is of no import. 



Labbe saw the error in considering the two species distinct. He 

 united them under the species name given by Stein, leaving the species 

 in the genus of Leger, calling the form Stephanophora lucani (Stein). 

 Ellis replaced the species in the genus to which it was assigned by Stein. 

 But, according to priority, and from the exhibition of all the evidence 

 in the case, the species name given by Dufour should stand valid and 

 the species be called Actinocephalus conicus (Dufour) Frautzius. 



The removal of the species from the genus Stephanophora takes 

 from the genus the type and only species and the genus thus drops out 

 of usage. 



