125 



cit. fig. 36); however the figure does not show, that they are conspicuously serrated alono- 

 the inner border. The third segment has a dorsal cirrus with a curved terminal joint, some- 

 what shorter than its peduncle. In a normal parapodium the central group of ventral bristles 

 have a stout, short appendix, usually not bifurcated and a squamous shaft with semilunar cusp 

 below the apex (Willey, loc. cit. pi. Il, fig. 43); in some figures however the cusp is absent 

 or faintly developed and the setae more resemble those of Ps. rigida (Willev, loc. cit. pi. 

 II, fig. 44). The inferior setae of the fascicle are more slender, with an elongated, bifurcated 

 appendix. 



2. Psammolyce flava Kinberg. PI. XXVII, figs. 9 and 10. 



KiNBERG, loc. cit., p. 3, pi. IX, figs. 44, A — II. 



Horst, Notes from the Leyden Museum, Vol. XXXV, 191 3, p. 189. 



Stat. 5. 7°46' Lat. S., i i4°3o'.5 L.ong. E. Anchorage of Djangkar (Java). Depth 330M. i specimen. 



A single incomplete specimen, measuring about 50 mm. in length, with 90 segments. 



Though Ps. flava, according to Kinberg, was found in the Atlantic near Rio Janeiro, 

 I do not hesitate to identify the Siboga-specimen with that species, on account of the charac- 

 teristic shape of its neuropodial setae (PI. XXVII, fig. loj. The appendix of those bristles 

 somewhat resembles the bill of a grallatory bird, being long, acuminate, faintly bent, with a 

 median fissure till about the middle of its length ; they quite agree with the description 

 and figures of Kinberg, only some transverse ridges on the shaft in the neighbourhood of 

 its distal extremity are not mentioned by hirri. The joint between the shaft and the appendix 

 is not always very obvious; even in some of the setae it is totally wanting and in that case 

 both are melted together. The appendix in the superior, the inferior and the median bristles 

 of this fascicle does not show such differences in length as in other species of the genus. 

 The neuropodium of the second segment (PI. XXVII, fig. 9) possesses setae, agreeing with 

 those of the corresponding segment in the preceding species ; their shaft, somewhat enlarged 

 in its distal end, bears only a few spinous whorls and the slender appendix is curved like a 

 sickle. Moreover this neuropodium bears at its distal extremity, besides the usual filiform pa- 

 pillae, a long cylindrical appendage, with a club-shaped end. With regard to the prostomium 

 I found in the Siboga-specimen the palpi not so long as figured by Kinberg ; they hardly 

 extend beyond the distal extremity of the setae of the buccal segment. The tentacle is absent. 

 Kinberg mentions two large eyes at the base of this organ ; he says, they are "parum con- 

 spicui", but I could not detect them. 



In the anterior segments the ventral side of the body as well as the middle of the 

 dorsum are smooth, without papillae and accordingly the coating with grains of sand is 

 nearly absent. Also the elytra are not so densely covered as usually and their boundaries are 

 more conspicuous ; therefore the worm has a less compact appearance and a looser structure, 

 like most of the deep-sea worms. In the posterior part of the body the venter is densely 

 covered with papillae, all of the same length, giving it a verrucous appearance. In the anterior 

 segments the elytra have the anterior border concave and smooth, whereas the remaining part 



81 



SIBOG.i-EXPEDITIE XXIVli. 17 



