70 THE ANNELIDA POLYCHAETA. 



PoLYNOE Savigny. 



Descript. Egypte. Hist, nat., 1809 [= 1822], 1, pt. 3, p. 20; McIntosh, British annelids, 1900, 1, pt. 



2, p. 389; Darboux, Bull. sci. France & Belgique, 1900, 30, p. 11. 

 Lepidonotus Quatrefages, Hist. nat. anneles, 1865, 1, p. 257 (in part). 

 Parapolynoe Czerniawsky, Bull. Soc. imper. nat. Moscou, 1822, 57, p. 187. 



POLYNOE INNATANS, Sp. nOV.^ 



Plate 8, fig. 1-7. 



Pale and semitransparent. 



The body is widest in front of the middle and from there widens very grad- 

 ually caudad and more abruptly cephalad. The greatest width, exclusive of the 

 parapodia, is 1 mm. ; inclusive of parapodia, but without setae, 2 mm. ; to tips 

 of setae, 3.5 mm. Length 9.5 mm. 



Prostomium decidedly wider than long; divided by a median longitudinal 

 furrow; bulging on each side in the usual manner. Eyes large, black, distinct, 

 the anterior the larger and much farther apart; posterior eye on each side close 

 to anterior, separated by much less than its diameter. Median ceratophore 

 attached somewhat higher up or more dorsally than the lateral, longer than the 

 latter, narrowing distad; style, which in the type is detached, much larger than 

 the palps, cylindrical, narrowing to a fine filament distally, sparsely, minutely 

 spotted with dark, and more sohdly darkened near the middle. The cerato- 

 phores of the lateral tentacles more cylindrical, short; the styles extremely 

 short, narrowed abruptly to a fine terminal filament which about equals in 

 length the proximal division and ceratophore together; the entire lateral tentacle, 

 inclusive of its ceratophore, does not greatly exceed the prostomium in length. 

 Palps short, abruptly narrowed distally in a conical tip. 



The parapodia of the peristomium extend obliquely cephaloectad as usual; 

 the ceratophores reach or extend a little in front of the level of the anterior border 

 of the head proper. At least one conspicuous curved seta. The styles of the 

 cirri are cylindrical and slenderly acuminate distad, the dorsal exceeds the 

 ventral, and both exceed the palps. 



Segmental papillae arranged as usual. Each is situated at the base of a 

 parapodium at the caudal edge and is a short conical process ending in a narrower 

 subcylindrical short tip which bends a little dorsad, the papilla as a whole 

 extending caudoectad. 



* innatare, to float. 



