234 ' ENDEAVOUR " SCIENTIFIC RESULTS. 



asymmetry of the jaws, especially the presence of the clawless 

 plate on the right side, agrees with what occurs in the species 

 of Oenone. 



There appear to be only three species of this genus hitherto 

 described, 0. lucida, Savigny 1 . 0. diphyllidia, Schmarda 2 , 

 and 0. pacifica, Fischli 3 . The worm described by Willey* 

 from Ceylon as Aglaurides fulgida, Savigny, is not a 

 a member of that genus according to the view of most zoo- 

 logist^, for it has the Oenonian arrangement of jaw plates, 

 which in Aglaurides are more nearly symmetrical. 



Willey seems to have overlooked the difference in the 

 character of the jaws as diagnostic of Oenone, for he supposes 

 that the only point of difference between the two genera lies 

 in the presence or absence of the tentacles ; and it is note- 

 worthy that in order to see these, he had to cut the peris- 

 tomium, as I have had to do. I suggest that it belongs 

 to the genus Oenone. 



Savigny, in his diagnosis of the genus Oenone, uses (p. 55), 

 as Ehlers has already noted, the phrase " Anteniies point 

 saillantes et comme nulle." I understand this to mean 

 that Savigny had recognised the existence of tentacles, and 

 wished to emphasise their small size so small are they that 

 *' they do not project ; there appear to be none." 



With the four species the present one cannot be confused, 

 owing to the details of the teeth. 



Aglaurides, too, has two distinct footless segments. 

 Oenone has but one, which, however, is double ventrally, 

 and the formation of the lower lip appears, from Ehlers' 

 account, to differ. 



From 0. diphyllidia, as described by Ehlers 5 , the present 

 species differs in the form of the prostomium, in the shorter 

 and thicker feet (compare his PI. xxxiv., fig. 4), in the wider 

 dorsal cirrus, and in details as to the number of denticu- 

 lations on the various jaw plates. 



Locs. East coast of Flinders Island, Bass Strait. 



Between Port Stephens and Newcastle, New South Wales, 

 20-60 fathoms. 



1. !Sa vigii V' System. Annelides, 1820, p. 55. 



2. Schmarda Neue Wirbellose Thiere, I., 2, 1861, p. 120. 



3. Fischli Abhandl. Senckenberg. Naturforseh. gcsellsch.. xxv.. 1900, 

 p. 108. 



4. Willey. Ceylon Pearl Oyster Fisheries, pt. IV., Suppl. Rep., xxx., 

 Polychseta. 1905', p. 284. 



5.' Ehlers Mom. Mus. Comp. Zool. Harvard, xxxi., 1887, p. 109. 



