REPOET ON THE ANNELIDA. 
243 
bristles, thus imparting a character to the species. The lobes are low and slightly 
pointed, and are directed outward and slightly upward. Toward the posterior end these 
processes are longer than the foot, and, indeed, increase in size from before backward. 
The bristles of the tenth foot have nearly the same shape as in Lumbriconereis 
fragilis, and their shafts are also of a brownish-black colour ; while the spines nearly 
correspond in number and colour. Indeed, nothing very diagnostic can be affirmed of 
the bristles or hooks of the Japanese form, except perhaps the larger size of the hooks 
and the very distinct serrations on the crowns. The latter differ from those of 
Lumbriconereis fragilis in the more evident distinction between the first (or lower) fang 
and the second, as well as the relatively larger size of the latter in some views in com- 
parison with the superior serrations (PL XVIIa. fig. 16). Position, however, apparently 
modifies these appearances. The specimen, a female, is distended with ova. 
The intestine contains greyish sand abounding in sponge-spicules, remarkable 
Radiolarians (?), composed of a minutely reticulated framework, with projecting processes 
more minutely reticulated. The spines on some cause the structure to resemble a 
mmVitQ Mol'padia. A few Foraminifera, Diatoms, and fragments of Algae are also present. 
Within the circular muscular, coat is a peculiar pennate arrangement, apparently of 
the outer fibres of the dorsal and ventral longitudinal muscles, the granular infolded 
parts being coloured brownish. The nerve-cords have a small median neural canal 
beneath the great superior one. 
This species has certain affinities with the Lumbriconereis lieteropoda of Marenzeller,^ 
from the Bay of Miya, Southern Japan. The peculiarly elongate foot of the latter, 
however, is diagnostic, though the structure of the bristles is similar. The shape of the 
bases of the maxillae diverges considerably. The posterior feet of Kinberg’s Lumbriconereis 
chilensis,^ from Valparaiso, show a similar bilobed arrangement in the posterior feet, but 
the lobes are much longer, and the structure of the bristles differs. In regard to the two 
bosses on the under surface of the snout, this form shows certain resemblances to the 
Lumbriconereis jacksoni of Kinberg,^ from Sydney, but in the dental apparatus (which 
appears to be of a type unusual in Lumbriconereis), the structure of the feet, and the 
outline of the hea d, the differences are pronounced. 
Lumbriconereis japonica, Marenzeller (PL XXXVI. fins. 13, 14, 15 ; PL XVIIa. 
fig. 17 ; PL XVIIIa. fig. 1). 
Ldimbrieonereis japonica, Marenzeller, Denkschr. d. k. Akad. d. Wiss. Wien, 1872, Sep. 
Abd., p. 29, Taf. v. fig. 3. 
Habitat. — Taken along with the foregoing at Station 232 (off the coast of Japan), 
^ Siidjapan. Annel., p. 30, Taf. v. fig. 4, and Taf. vi. fig. 1. 
^ Freg. Eugen. Eesa, Taf. xviii. fig. 37 ; and Ofversigt Ic. Vctensk.-Akad. Forhandl, 1865, p. 569. 
^ Ofversigt k. Vetensk.-Akad. Forhandl., 1864, p. 569. 
