182 THE ANNELIDA POLYCHAETA. 



proportionately very small; proximally it narrows to a slender, acute process 

 by which attached; distally it is bidentate, with the apical tooth much the 

 larger, curved. The notopodial setae are flattened, proportionately to the 

 width veiy thin, finely fibrillate, distally acutely narrowed and commonly curved. 



Epitokous Female. 



Fragments of females of this species agree in general structure with the 

 male as above described, excepting that ova are not restricted to the anterior 

 region but occur throughout the length as in the autolytids. The body, in 

 consequence of the contained eggs, is posteriorly more robust. The eyes are 

 clearly smaller than in the male, the upper ones not exceeding the lower and lying 

 more directly above them. (Plate 22, fig. 3). 



Locality. Gilbert Island: off Arhno Reef. Surface by night light. 21 

 Januaiy, 1900. Numerous specimens. 



This species is interesting among syllids in having the functional sex-organs 

 distributed as in the pelagic or sexual forms of Autolytus and related schizogam- 

 ous types, rather than as in the typical epitokous form. This may be one of the 

 species having both types of reproduction, or it may have but the one. The eyes, 

 large as usual in the sexual forms, are distinctive in their form and positions. 



Sphaerodoridae. 



No members of this family were secured by the Albatross on the expedi- 

 tions with which the present memoir is concerned. The genera may be sepa- 

 rated as follows: 



Key to Genera. 



a. Body long; and cylindrical; dorsal surface with two series of spherical capsules; peristomium with 

 a pair of similar appendages. 



6. Setae composite Ephesiella, gen. nov.' 



6b. Setae simple Hypephesia Perrier. 



aa. Dorsal surface with six series and ventral surface with four scries of spherical capsules without 

 papillae; peristomium with a pair of clavate appendages; body short and broad. 



Sphaerodarum Oersted. 



Synonymy of Genera. 



Bebryce Johnston is preoccupied. 



Pollicita Johnston has as its type P. peripatus Johnston {non Claparede), 



' Ephesia peripatus Claparede, genotype. 



