69] STUDIES ON GREGARINES—KAMM €9 



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 Carus 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 

 1845 Gregarina oligacantha 

 1845 Gregarina oligacantha 

 1848 Gregarina oligacantha 

 1848 Stylorhynchus oligacanthus 

 1848 Stylorhynchus oligacanthus 

 1851 Gregarina oligacantha 

 1859 Gregarina oligacantha 

 1863 Gregarina oligacantha 

 1875 Hoplorhynchus oligacanthus 

 1899 Hoplorhynchus oligacanthus 

 1903 Hoplorhynchus oligacanthus 

 1911 Hoplorhynchus oligacanthus 

 1913 Hoplorhynchus oligacanthus 



Sporonts solitary, slender. Dimensions 

 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 



