28 ILLINOIS BIOLOGICAL MONOGRAPHS [28 



POLYRHABDINA PYGOSPIONIS Caullery and Mesnil 

 1914 Polyrhahdina pygospionis Caullery and Mesnil 1914: 520 



No description given. 

 Host: Pygospionis seticornis. 



Genus SYCIA Leger 1892: 52 

 Polycystid intestinal parasite of marine annelids. Epimerite knobbed, 

 bordered by a thick ring. Protomerite subspherical, deutomerite conical, 

 with numerous inclosures. 



Septate gregarine, ellipsoidal. No dimensions given. Ratio LP : TL 

 ::1:6; WP : WD ::1 :1.5. Protomerite conoidal, broadest at septum. 

 Deutomerite ellipsoidal, tapering rapidly to a sharp point. Nucleus large, 

 spherical, one karyosome. 



Epimerite an elongate papilla upon a short neck around which is a 

 collar a little larger than the papilla itself. 



Intestine of Audouinia Lamarkii (A. tentaculata — Brasil). 



Taken at Belle-Isle-sur-Mer, France. 



Caullery and Mesnil (1914) give the host name as the latter above, and 

 note 



. . . c'est une esp^ce voisine, sinon identique, que Mingazaini (1891) a d6nomm6e 

 Vlivina n. g. elliptica 



but since the cyst and spores of both species are unknown, this cannot at 

 present be determined. 



This species possesses characteristic elongate crescentic or biconical 

 inclusions in the deutomerite only of adult sporonts. (Fig. 119). L6ger 

 offers the hypothesis that they may be condensations of protoplasm in re- 

 serve masses. 



Brasil found this species with its epimerite and the inclusions, thus 

 verifying Lager's work of sixteen years previous. 



Genus ULIVINA Mingazzini 1891: 235 



Body elongate-ellipsoidal, "external membrane continuous around 

 animal." Protomerite the more dense. Epimerite simple, spores unknown. 

 Intestine of marine polychaetes. 



