26 ILLINOIS BIOLOGICAL MONOGRAPHS [26 



Intestine of Polymnia nebulosa M.; Notomastus exsertilis N.S.; and 

 Petaloproctus terricola Qfg. 



LECUDINA LEGERI (Brasil) Kamm 



1909 Doliocystis legeri Brasil 1909: 71, 123 



1911 Doliocystis legeri Sokolow 1911:284 



1922 Lecudina legeri Kamm 1922 (this paper) 



Sporonts cylindrical, 100/x by 25ju. Nucleus ovoidal, with one karyo- 

 some. Epimerite a rhizoid filament which penetrates to the base of the 

 host-cell (Brasil). 



Cysts small, 45^ in diameter, spores typical, releasing eight sporozoites. 



Intestine of Glycera convoluta Kef. 



Taken on the Mediterranean Coast. 



LECUDINA sp. Faria, Cunha, and Fonseca 

 1918 Doliocystis sp. Faria, Cunha, and 



Fonseca 1918: 17 



1922 Lecudina sp. Kamm 1922 (this paper) 



Sporonts spindle-shaped, nucleus spherical. 

 Host: Poly dor a socialis Schmerda. 

 Taken near Rio de Janeiro, Brazil. 

 Not enough data exists to definitely fix the position of this species. 



Family POLYRHABDINIDAE Kamm 1922 (this paper) 

 Polycystid (septate) gregarines inhabiting the digestive tract of poly- 

 chaetes. Epimerites varied. 



DISCUSSION OF THE NEW FAMILY POLYRHABDINIDAE 



The true septate intestinal gregarines of marine annelids fall under 

 three genera, which are placed in various positions by different workers on 

 the subject: 



(a) Two genera were described very meagerly by Mingazzini in 1891 

 under one name, Polyrhabdina, two very different parasites being found in 

 the same host material. The one has been removed to the Schizogregarines 

 (Selenidium), while the other represents the genus as named, and is a 

 pyriform septate species which possesses an epimerite in the shape of a 

 corona of hooks. 1 



(b) The genus Sycia Leger 1892 is characterized by its septate sporonts 

 and unique epimerite in the form of a large rounded papilla with a thick 



1 Mingazzini's description follows: . . . specie dimorfe. Individue a forme di nematode 

 e piriformi. I primi hauno il corpo allungato fusiforme e la cuticula striata longitudinalmente 

 du rhlzi numerosi finissimi. 



