28 ILLINOIS BIOLOGICAL MONOGRAPHS [28 



POLYRHABDINA PYGOSPIONIS Caullery and Mesnil 

 1914 Polyrhabdina 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. 



SYCIA INOPINATA Leger Type Species 



[Figures 118 and 119] 



1892 Sycia inopinata Leger 1892:52,90 



1899 Sycia inopinata Labbe" 1899: 34 



1903 Sycia inopinata Minchin 1903:203,326 



1909 Sycia inopinata Brasil 1909: 121 



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 espece voisine, sinon identique, que Mingazzini (1891) a d6nomm6e 

 Ulivina n. g. elliptica 



but since the cyst and spores of both species are unknown, this cannot at 1 

 present be determined. 



This species possesses characteristic elongate crescentic or biconical 

 inclusions in the deutomerite only of adult sporonts. (Fig. 119). Le*ger 

 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 Leger'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. 



