6i 



there are 13 pairs of them, but their number can hardly be counted withoul doing too mucli 

 damage to the unique specimen. The parapodia are long and slender, measuring about two 

 thirds of the breadth of the body. The dorsal cirri are enormously long, with clavate tip, 

 but without distinct terminal joint; the ventral cirri are slender, conical, not cxtending bevond 

 the extremity of the foot. Instead of the glochideal setae there is a fascicle of slender, yellow, 

 not verv lono- bristles, terminating in a large, br o w n-col o u r ed , curved hook (PI. XII, 

 fi>^>-. 20); their shaft is longitudinally striated and the hook is somewhat enlarged in the middle. 

 The ventral bristles are slender, provided with 4 teeth, that decrease in size distally (PI. XII, 

 fio-. 21). The head is oval, nearly as broad as long, with two short eye-peduncles, with pig- 

 ment spots ; between them the tentacle arises with a stout, cylindrical basal part. lts distal joint 

 is long and slender, four to five times as long as the head, with a clavate tip. The paljjs 

 are rather long, smooth, tapering distally. 



Genu.s PontOgenia Claparède '). 



Dorsal bristles (paleae) golden-yellow, sHghtly bent, serrated, arranged like a fan ; ventral 

 setae few, bifid. A dorsal feit usually present. 



P^our sijecimens of the genus J'imtogcnia, that hitherto has not been observed in the 

 Malayan seas, were collected by the Siboga Expedition at the Stations 154, 204 and 305 ; they 

 could not be identified with one of the species, already described from the Indian Ocean. Pon- 

 togenia indica -), mentioned by Grlbk from the Philippines and by Willp:v from Ceylon ^), 

 is characterized by a rather large number of segments (viz. 45) and by the presence of iS 

 pairs of elytra i afterwards Potts examined a species from Zanzibar, that possessed 1 5 pairs 

 of scales and showed so much resemblance with P. chrysocoma from the Mediterranean, that 

 it was described by him as a variety of that species (/'. chrysocoma var. iiiinutd) *). I was 

 glad to have the opportunity to examine some specimens of P . cln-ysocoiiia from Naples in 

 our Museum-collections and to compare them with the .Siboga-specimens ; though the discrimi- 

 nation is not very easy, because their setae are usually coated with detrital particles and their 

 body is heavily contracted, I believe that the .Siboga-worms represent two different species, 

 which, though resembling each other in many characters, can easily be distinguished by the 

 difterent appearance of their paleae. 



Examining anew the question of the presence of elytra in Paliuyra, I can no longer 

 maintain my opinion, uttered some years ago in a paper "On a Bhawania-specimen" (Notes 

 from the Leyden Museum, vol. XXX). I suppose that Mc Intosh has been mistaken and that 

 the worm, collected by the Challenger Expedition at Station 233^ (near Kobé, Japan) and 

 with some hesitation identified by him with Paliiiyra anrifera .Sav. ") also belongs to /'on- 



i) Les AnnOlideb Chctopodes du Golfe de Naples, p. 367. 



2) Annulata Semperiana, p. 19, PI. T, fig. 4. 



3) Loc. cit. p. 246, PL I, fig. 5. 



4) Loc. cit. p. 329, PI. XX, figs. 26 and 27 : PI. XXI, figs. 35 and 36. 



5) Challengev-reports, Annelida Polychaeta, p. 53, PL IX,' figs. I and 2. 



?;iiiOG.\-E.vri;DiTiE xxiv' ö. 



