69] STUDIES ON GREG ARINESK AMU 69 



Habitat: Intestine of Phryganea varia (Fabricius), larva. 



Taken at Wurzburg, and Poitiers (France). 



Kolliker gives as hosts Phryganea grandis 'and other Phryganeidae 

 larvae.' The only point of serious conflict between the two sets of obser- 

 vations lies in the shape of the nucleus. We are led to believe this one of 

 the fixed characters of a species, but Kolliker finds the nucleus to be 

 spherical, while Schneider says it is ovoidal. In P. chinensis, however, it 

 is spherical, so this is not a genus character. 



Schneider does not doubt the identity of the two species. 

 La figure donnee par Kolliker ne laisse aucun doute sur la synonymic 



Frantzius gives a beautiful figure of a trophozoite which agrees in every 

 particular with the observations of others except that the nucleus here too 

 is spherical (Fig. 72, this paper). I am inclined to think Schneider's obser- 

 vations were in error or mis-interpreted in the rapidly moving animals and 

 that the correct shape in all three sets of data is spherical. 



Genus HOPLORHYNCHUS Cams 1863:570 



Sporonts slender with elongate ovoidal nuclei. Epimerite a very long 

 neck with six to eight slightly recurved hooks. Cyst dehiscence by simple 

 rupture. Spores ellipsoidal. 



HOPLORHYNCHUS OLIGACANTHUS (von Siebold) Schneider 



Type species 

 [Figures 13 and 14] 



1839 Gregarina oligacanthus von Siebold 1839: 67 



1845 Gregarina oligacantha Dujardin 1845: 638 



1845 Gregarina oligacantha Kolliker 1845: ? 



1848 Gregarina oligacantha Kolliker 1848: 10 



1848 Stylorhynchus oligacanthus Stein 1848: 195, 222 



1848 Stylorhynchus oligacanthus Frantzius 1848: 195 



1851 Gregarina oligacantha Diesing 1851:7 



1859 Gregarina oligacantha Diesing 1859: 730-1 



1863 Gregarina oligacantha Lankester 1863: 95 



1875 Hoplorhynchus oligacanthus Schneider 1875: 591 



1899 Hoplorhynchus oligacanthus Labbe 1899: 30 



1903 Hoplorhynchus oligacanthus Minchin 1903: 201, 333 



1911 Hoplorhynchus oligacanthus Wellmer 1911:139 



1913 Hoplorhynchus oligacanthus Ellis 1913: 275 



Sporonts solitary, slender. Dimensions not given. Ratio LP:TL: : 

 1:4; WP:WD: :1:1. Protomerite irregularly rounded, slighlty wider than 

 deutomerite. Widest at mid-region, constricted at septum. Deutomerite 

 irregularly cylindrical, tapering posteriorly and ending in a blunt point. 

 Epimerite a corona of six to eight slightly recurved hooks set upon a long 



