POLY'CH.ETA. BENHAM. 179" 



These cirri have enlarged eirrophures, and the flagelhuu 

 is minutely annalated. 



The 16 parapodia have the usual form, and each carries a 

 long dorsal cirrus, sj^ringing from an enlarged cirrophorc ; 

 the filament being about three tunes the length of the para- 

 podium, that is, as long as the width of the body. The four 

 anterior parapodia are smaller, the first much shorter, than 

 the rest. 



The chaetophoral sac has at its antero-dorsal margin a short 

 filamentous " ligule " into which the black aciculum projects. 

 This is easily overlooked unless the foot is mounted with the 

 anterior surface upwards. It is not shown in MTntosh's 

 figure of the foot. 



The chaetse are pale yellow, and of the usual form. 



The ventral cirrus reaches beyond the end of the para- 

 podium almost to the tips of the chsetse. 



The preanal segment carries dorsal and ventral cirri but 

 no distinct parapodium. The subanal cirri, borne by the 

 anal funnel, are as long as the dorsal cirri anteriorly. 



Loc— Off Babel Island, Bass Strait. 50-80 fathoms. 



Distribution. — Red Sea, Indian Ocean, Pacific Ocean 

 (Tongatabu). 



Family APHRODITID.i:. 

 Sub-Family POLYNOIN^. 

 Genus Polynoe {sensu latu),^ Savigny. 



Por.YNOE PLATYCIRRUS, M'IntoSil. 



Polynoe plalycirrus, M"Intosh, C'hall. Rep., Zool., xii., 1885, 

 p. Ill, pi. iii., fig. 4, pi. xvi., fig. 2, pi. xix., fig. 3, pi. 

 viiiA., figs. 14, 15, pi. ixA., fig. 1. Id.. Potts, Trans. 

 Linn. Soc, Zool. xiii., 1910, p. 336. 



The material consists of two entire individvials and the 

 greater part (anterior end included) of a third. 



A complete specimen measures 75 mm. in length l»y I) n.ni. 

 across the elytra and 12 mm. over the ventral chset.-e. 



1. The whole subject of the delimitati(ju of the cencra of the Pol3'uoiii:e 

 seems ahnost in as mueh confiuion as at the time Grube Avrote his classic 

 paper " Berinerkimi^ren Fam. Aphroditen Polynoina," in 1875. 



