52 , ILLINOIS BIOLOGICAL MONOGRAPHS [52 



SCIADOPHORA CAUDATUS (Rossler) Kamm 



[Figures 112 and 113] 



1882 Stylorhynchus caudatus Rossler 1882:700 



1899 Stylorhynchus caudatus Labbe 1899: 33 



1903 Stylorhynchus caudatus Minchin 1903:338 



1913 Stylocephalus caudatus Ellis 1913:338 



1922 Sciadophora caudatus Kamm 1922 (this paper) 



Sporonts solitary, 2 to 2.5 mm. with a long "tail-process" 2 to 3 mm. 

 in addition. This makes the species the longest known gregarine. Body 

 similar in shape to S. fissidens except for the tail. The protomerite is 

 situated upon a short neck with a dome-shaped top and a corona of twelve 

 digitiform processes at the mid-region. Nucleus spherical. 



Intestine and caeca of Phalangidae sp. 



Taken at Freiburg, Germany. 



This species and the preceding one are differentiated by the character of 

 the protomeritic corona. Cf. Figs. Ill and 113. It is evident that they 

 belong to the same genus, for the corona of each is a part of the proto- 

 merite rather than of an epimerite. Rossler considers the fact that this 

 species possesses a long neck upon which is superimposed the protomerite 

 sufficient evidence to place it in the genus Stylocephalus, but the coronae 

 are so similar and the host identical the two found in the same intestines 

 leads one to suspect that the two forms may represent parts of a single 

 life-history. Further investigations are, however, necessary to establish 

 this statement or refute it. 



Rossler says concerning the species: 



.... besitzt einen gestielten Kopf, der mit zwolf Erhebungen oder Leisten verstehen ist, die 

 tiber den Rand desselben hinausragen und sich theilen. Diese Form ist ausserdem mit einem 

 diinnen, schwanzartigen Anhang versehen der durch keine Scheidewand von dem eigentlichen 

 K6rper getrennt ist, jedoch auch keine einspringenden Konturen zeigt, die auf einen ver- 

 stummelten Zustand schliessen liessen. 



SCIADOPHORA GORONO-WITSCHI (Johansen) Labbe 



[Figures 104 and 105] 



1894 Actinocephalus Goronowitschi Johansen 1894: 140 



1897 Lycosella Phalangii Leger 1897:11,36 



1899 Sciadophora goronowitschi Labbe 1899: 18 



1903 Sciadophora goronowitschi Minchin 1903:338 



No dimensions or complete figure are given. Johansen describes the 

 peculiar parasite thus: 



. . . naher zum Deutomerit gelegenen Aquator eine Reihe von Hackchen und Dornchen zur 

 Befestigung des Parasiten an dem Gewehen der Phalangide dient. 



His meagre illustration, Fig. 105, indicates a bifurcation of the processes, 

 as in the species found by Rossler. 



