27] STUDIES ON CREGARINES KAMM 27 



ring or collar around the base. The deutomerite of the adult sporont, 

 only, contains numerous elongate crescentic or ellipsoidal inclusions 

 probably "reserve protoplasm." 



(c) The third genus, Ulivina Mingazzini 1891, has little to characterize 

 it. In fact so little is known concerning its development that it cannot be 

 placed with either of the two named genera and hence must stand distinct 

 until its position shall have been proven. The epimerite, is simple so far 

 as known and cyst and spores are unknown. 



The cysts and spores are still unknown for all three genera. 



Since a septum is present without exception in all three, they must be 

 included in the suborder Cephalina, but stand near the borderline with the 

 Acephalina because of their presence only in polychaetes. 



Genus POLYRHABDINA Mingazzini 1891:229 



(Polyrhabdina Labbe 1899:48) 



Septate, sporonts flattened, ovoidal, epimerite a corona of hooks. In- 

 testine of polychaetes of the family Spionidae. (Cyst and spores unknown.) 



POLYRHABDINA SPIONIS (Kolliker) Mingazzini Type Species 



. [Figures 128, 129] 



1848 Gregarina Spionis Kolliker 1848: 4 



1851 Gregarina Spionis Diesing 1851:18 



1891 Polyrhabdina Spionis Mingazzini 1891:229 



1893 Polyrhabdina Spionis Mingazzini 1893: 56 



1903 Doliocystis sp. Minchin 1903: 327 



1914 Polyrhabdina spionis Caullery and Mesnil 1914: 516 



Septum present. Sporonts 100 by 35/z, ellipsoidal, nucleus spherical, 

 one large karyosome. 



Epimerite a flattened apical corona of 8 to 10 ameboid digitiform 

 ^processes frequently bifurcate. 



Development extracellular. Cyst and spores unknown. 



Intestine of Scololepsis fuliginosa; S. ciliata (?). 



Taken at Naples. 



Minchin mentions a species from the same host, but places it in the ge- 

 nus Doliocystis. Since no data is given and the hosts are identical, it is 

 placed here. 



POLYRHABDINA BRASILI Caullery and Mesnil 

 1914 Polyrhabdina brasili Caullery and Mesnil 1914: 518 



Sporonts ovoidal, 200/t in length. Epimerite characteristic, but spines 

 shorter than type. 



Cyst and spores unknown. 



Host : Spio. martinensis. 



