164 ILLINOIS BIOLOGICAL MONOGRAPHS [402 



HENNEGUYA MONURA (Gurley) Labbe 

 [Fig. 507] 



1880 Ryder 1880 : 211-212 



1893 Myxobohis monurus Gurley 1893 : 416 



1894 Myxobolus monurus Gurley 1894 : 249-250 

 1899 Henneguya monura Labbe 1899 : 103 



Habitat: Subcutaneous intermuscular tissue of Aphredoderus say anus 

 Gill.; New Jersey (Woodbury). 



Vegetative form: Cysts, lenticular, large, white, opaque and numerous 

 (20). Membrane thin. 



Spore: Lenticular or slightly obovate. Tail 2 to 3 times longer than 

 the body. 



HENNEGUYA KOLESNIKOVI (Gurley) Labbe 



[Fig. 508] 



1886 Kolesnikov 1886 : 242-248 



1894 Myxobolus holesnikom . Gurley 1894 : 256-257 



1898 Myxobolus bicaudatus (part) Zschokke 1898 : 602-604, 646- 



655, 699-703 



1899 Henneguya kolesnikovi Labbe 1899 : 103-104 



Habitat: Interstitial connective tissue of the thoracic and intercostal 

 muscles of Coregonus lavaretus L. ; Russia. 



Vegetative form: Cysts numerous (80), spherical or oval; length 10 

 to 30mm., breadth 7 to 20mm. 



Spore: Oval with a pointed anterior end. Tail three times longer than 

 the body. 



Remarks: Zschokke thinks the present species is identical with Henne- 

 guya zschokkei. But the evidence is not clear enough to bring one to 

 agree with him due to the incomplete description of the present species. 



HENNEGUYA MACRURA (Gurley) Thelohan 

 [Figs. 509 to 512] 



1893 Evermann 1893 : 76 



1894 Myxobolus macrurus Gurley 1894 : 250-253 



1895 Henneguya macrura Thelohan 1895 : 354 



Habitat: Subcutaneous connective tissue of head of Hybognathus 

 nuchalis Ag.; Neches River, Texas (November, temperature of water 

 9°.4C.) Of frequent occurrence. 



Vegetative form: Cysts, elongated 6mm. by 2mm. or less. 



Spore: Rounded oblong. Dimensions: length 10 to llju, breadth 

 6 to 8ju, thickness 4/i. Shell-valves unequally convex. Tail 30 to 40m. 



