210 
THE VOYAGE OF H.M.S. CHALLENGER. 
an opinion on the subject, to adopt the plan followed by Claparede, Grube, and Elders 
in this case. Thus the distal region of the proboscis is termed the maxillary ring, the next 
the basal. The first (I.) series of paragnathi is the median dorsal at the base of the 
maxillae ; II. indicates the group on each side of the foregoing ; III. the median ventral 
at the base of the maxillae; IV. the lateral series adjoining the last; V. the median 
dorsal series of the basal ring of the proboscis ; VI. the lateral series on each side of 
the foregoing ; VII. and VIII. the remaining lateral and ventral paragnathi of the same 
ring, generally disposed in a more or less continuous series. Too much reliance, however, 
should not be placed on the paragnathi, as we are not yet fully acquainted with their 
sexual and other variations. 
The Nereidse often secrete somewhat hyaline tubes in which they dwell, or burrow in 
muddy sand under stones like Nereis cultrifera, Grube. Some again frequent crevices 
in rocks, the stems of decaying tangles, or sponges, as in the Nereis hircinicola of Eisig. 
Nereis, Linnaeus. i 
Nereis [Platynereis) kobiensis, n. sp. (PI. XXXIV. figs. 3, 4, 5, 6 ; PL XVIa, figs. 2, 3, 4). 
Habitat. — Dredged at Station 233a (near Kobe, on the west coast of Japan), May 
19, 1875; lat. 34° 38' N., long. 135° 1' E.; depth, 50 fathoms; surface temperature, 
6 2° ’6 ; sea-bottom, sand. 
Head somewdiat longer than broad ; tentacles about the length of the head. Palpi 
large, the tips of the bosses scarcely reaching those of the tentacles. Eyes large and 
furnished with lenses. Tentacular cirri attenuate, the longest reaching to the fourteenth 
or fifteenth segment. Paragnathi of proboscis — I. and II. absent; III. irregular transverse 
series; IV. in triangular groups, the points being larger than in III.; V. absent; VI. 
double transverse rows ; VII. and VIII. in tolerably continuous curved rows. Maxillse 
pale brown, with eight teeth besides the fang. The first segment of the body longer than 
the second, and with a peak directed forward in front. From the fifth to the eleventh 
the feet have blunt lobes. The latter become larger posteriorly. 
The specimens are fragmentary, the longer measuring about 50 mm. and about 
4 '5 mm. in breadth anteriorly. 
The body presents no coloration dorsally, the only pigment present being that in the 
glandular masses (“ Spinndriisen,” Ehlers) at the bases of the feet. 
The tentacles are about the length of the head (PI. XXXIV. fig. 3), which bears a 
general resemblance to that of Nereis dumerilii, Aud. and Ed., as also do the 
palpi and long tentacular cirri. The eyes are large, and situated in proximity on each 
side, but they do not touch. The anterior pair are somewhat larger, and as the lens is 
placed at the anterior and outer margin, their appearance diverges from that of the 
