70 ILLINOIS BIOLOGICAL MONOGRAPHS [70 



slender cylindrical neck. Nucleus elongate-cylindrical with many small 

 karyosomes. 



Cyst and spores as in genus characters. 



Intestine of Calopteryx (Callopteryx, Schneider) virgo L., larva, and 

 C. splendes Harb. larva. 



Taken at Danzig, Berlin and Paris. 



With all the authors who mention the species, only one gives adequate 

 figures, Schneider, from whom the data and drawings is taken. 



Diesing (1859) reports: 



Proboscis longissima gracilis medio ventricosa, apice subglobosa, spinularum (circa 9) corona 

 simplici. Receptaculum subglobosum compressum. Corpus conicum lacteum receptaculo 

 quinquies longius. 



Lankester considers Actinocephalus sieboldii and the present species 

 synonymous. 



Family ACANTHOSPORIDAE, Leger 1892: 167 



Sporonts solitary, epimerite simple or appendicular. Dehiscence by 

 simple rupture. Spores with equatorial and polar spines. 



Genus ANCYROPHORA Leger 1892: 146 



Epimerite a globe with a corona of not more than 12 backwardly- 

 directed blunt hooks. Spores biconical with equatorial and polar spines. 



ANCYROPHORA UNCINATA Leger 



[Figures 27, 41 and 42] 



1848 Gregarina Dytiscorum Frantzius 1848: 194 



1892 Ancyrophora uncinata Leger 1892: 147 



1899 Ancyrophora uncinata Labbe 1899: 28 



1903 Ancyrophora uncinata Minchin 1903:201,335 



1916 Ancyrophora uncinata Watson 1916a: 164 



Sporonts solitary, elongate. Length 150-200/u. Protomerite well 

 rounded, deeply constricted at septum. Deutomerite widest at shoulder, 

 tapering from thence to a long slender acuminate posterior extremity. 

 Epimerite a corona of twelve or less short blunt recurved hooks, superim- 

 posed upon a distinct but rather short stout neck. The hooks are arranged 

 in two levels, the upper group being larger and stouter. Nucleus spherical 

 with several karyosomes. 



Cysts spherical, 200/u, spores biconical, hexagonal in optical section, 

 with four spines at each pole and six on equator. Spores 8 by 6/i. 



Intestine of larvae of Sericostoma sp., Phryganea rhumbica, and of two 

 beetles, Dytiscus sp. and Colymbetes sp. Minchin adds Limnophilus 

 rhombicus, probably a synonym of the second. 



Taken in France. 



