120 ILLINOIS BIOLOGICAL MONOGRAPHS [33© 



It is this character which led him to place the gregarine in the genus 

 Stenophora. He adds: 



"The suggestion is permissible that this form is actually the common Steno- 

 phora julipusilli Leid}', somewhat altered from being in the wrong host ". 



The suggestion that the species belongs to the family Stenophoridae is 

 excluded when one considers the method of cyst dehiscence, which is that 

 characteristic of the family Gregarinidae rather than that of the Steno- 

 phoridae. 



The sarcocyte at the anterior end of the protomerite is often thick- 

 ened and papillate but I have not seen a trace of a pore. 



A t^ble of measurements follows, all dimensions being given in 

 microns : 



Length sporont 500 490 470 420 370 290 



Length protomerite 



"Width protomerite 



Width epimerite 



Width deutomerite 



Batio 



length protom. : tl. length 1 :6.3 1 :7 1 :6 1 :7 1 :6.1 1 :6 

 width protom. : width deu. 1 :1.3 1:1.7 1:2 1:1.7 1:1.6 1:1.2 



LEIDYANA GRYLLORUM (Cuenot) Watson 



1897 Clepsidrina gryllorum 



1900 Gregarina macrocephala 



1901 (rregarina gryllorum 

 1916 Leidyana gryllorum 



Leidyana: Sporonts solitary, never associative, cylindrical. 

 Length 420/*. Ratio length protomerite : total length : : 1 : 5 ; width 

 protomerite : width deutomerite : : 1 : 1.1. Protomerite subspherical, a 

 deep constriction at septum. Deutomerite cylindrical, conical at end. 

 Epimerite globular, nucleus small, spherical. Cysts spherical or ovoi- 

 dal, 190 to 240/i in diameter. Spore ducts 3 to 8/*. Spores barrel shaped^ 

 7/x in longest axis. 



Taken in Ardennes and Meurthe-et-Moselle, France. Host: GryU 

 lu^ domesticus (L.). Habitat: Intestine. 



Labbe placed this species which had been mentioned but not de- 

 scribed by Cuenot as a synonym of Gregarina macrocephala Schn., 



