480 NERINIDES LONGIROSTRIS. 
Nerme. Anus dorsal with a sucker-like multilobed ciliated border not surrounded by cirri. 
Rose-red anteriorly, dull-green posteriorly. Branchis commence on the first foot, and 
continue nearly to the posterior end, the superior lamella forming a border. Both dorsal 
and ventral divisions of the foot have winged bristles anteriorly, and they continue in the 
dorsal division to the posterior end. Hooks appear m the ventral division from the thirty- 
third to the forty-fifth segment, with, at the inferior border, a few simple capillary bristles. 
SYNONYMS. 
1843. Malacoceros longirostris, De Quatrefages. Mag. Zool., p. 12, pl. iu, figs. 7 and 8. 
1865. * a Annel., t. 1, p. 444. 
1894. Nerine longirostris, De St. Joseph. Ann. Sc. nat., 7° sér., t. xvii, p. 74, pl. iv, figs. 86—90. 
1896. Nerinides longirostris, Mesnil. Bull. Sc. France et Belg., t. xxix, p. 152. 
1914. © E Southern. Proc. Roy. Irish Acad., vol. xxxi, No. 47, p. 97. 
OMS: . nS McIntosh. Ann. Nat. Hist., ser. 8, vol. xv, p. 2. 
1922. “3 . idem. Ibid:> ser. 9, vol.1x, p. 18: 
Habitat.—Blacksod Bay (Southern). 
Distribution. St. Malo (De Quatrefages) ; ? EHhbien, France (De St. Joseph). 
The head is acutely pointed, with a median ridge (which runs backward to the third 
segment), on which four eyes in a square are placed, and the sides have a flattened process 
(peristomium), from which pass a pair of short tentacles of a golden-yellow colour, and these 
when separated retain vitality for three days (De St. Joseph). Beneath them is a ciliated 
groove with pigment-granules, and possibly with urticating elements (De St. Joseph). The 
tentacles, as in allied forms, aid in procuring nourishment. Body 10 cm. long and 8 mm. 
broad, slightly tapered anteriorly, and more so posteriorly, where it ends in a dorsal anus 
with a multilobed ciliated border, not surrounded by cirri. The colour is rose-red anteriorly 
(probably from the blood-vessels), but from the fortieth segment or thereabout the posterior 
region is dull-green, almost blackish, whilst near the vent the intestine is yellowish, and is 
usually filled with Ressoa parva. 
The first segment carries a branchia, and has a dorsal and a ventral division with bristles. 
There are two lamellee, the posterior larger than in N. foliosa and bordering the branchia. 
Behind the anterior lamella is a flattened disc with a tuft of bristles similar to the inferior 
lamella but longer. The general structure of the anterior foot is represented in Plate 
CXXXVI, fig. 6, and a bristle in Fig. 6a, also m Plate CX XXIII, figs. 18 and 18a. From 
the thirty-third to the forty-filth segment, according to the size of the individual, the inferior 
division bears two or three bifid and hooded hooks (Plate CX XXIII, fig. 18), which by- 
and-by increase in number to about twenty, and at the ventral border a few wingless capillary 
bristles. Simultaneously the posterior lamella forms a margin only to the first part of the 
branchia, which also is smaller. The feebly winged bristles persist to the posterior end 
in the dorsal division, but without accompanying hooks. In the last twelve or thirteen 
seoments the branchize progressively diminish and disappear. 
Mesnil! (1896) gave a succinct description of the genus Neriides, which he had established 
for De St. Joseph’s Nerme longirostris, thus :—Prostomium without frontal tentacles. 
1 «Bull. Sc. France et Belg.,’ t. xxix, pp. 119-152. 
