444 OXYDROMUS PROPINQUUS. 
anterior pair being wider apart and with lenses; median tentacle short, the lateral more 
than twice as long; palpi biarticulate ; four tentacular cirri, the largest and longest being 
the posterior dorsal. Proboscis orange, extending to the fifth bristled segment, series of 
serrated papille anteriorly, and a minutely papillose surface. Body from 6—10 mm. in 
length, typical in outline, and having posteriorly two long articulated anal cirri and a median 
process. Pale, with symmetrical brownish bars and two median touches in each segment. 
Feet well developed, dorsally with a long, articulated dorsal cirrus, and ventrally a shorter 
cirrus ; dorsal setigerous process has two spines and long, simple, slightly curved bristles, 
with a serrated edge. The ventral bristles have articulated terminal pieces—more or less 
bifid, and longer dorsally, shorter ventrally. Well-developed eggs in April, and they pass 
into the feet. 
SYNONYMS. 
1875. Gyptis propinqua, Marion and Bobretzky. Ann. Sc. nat., 2° sér., t. nu, p. 51, pls. v and vi, 
fie. 15, 
1888. Oxydromus propinquus, De St. Joseph. Ann. Sc. nat., t. v, p. 321. 
1914. ss * Southern. Proc. Roy. Ivish Acad., vol. xxxi, No. 47, p. 47. 
1915. es " Aller, — di@mwem, IL, 183, cy WOll, 5% jd COZ. 
1921. ag Ba McIntosh. Ann. Nat. Hist., ser. 9, vol. viii, p. 298. 
Habitat—In the surface tow-net, as well as on the bottom, Ballynakill Harbour 
(Southern) ; dredged near New Grounds Buoy, Plymouth (Allen). 
Shores of France and Western Mediterranean in the coralline zone (Marion and 
Bobretzky), Dinard (De St. Joseph). 
The head is somewhat cordate in outline, broad posteriorly where the dimple is, nearly 
straight at the narrower anterior end, and having four eyes in a trapezoid about the middle, 
the anterior pair being bean-shaped, larger, wider apart, and furnished with lenses. The 
median tentacle is short and slightly fusiform, the lateral more than twice as long, a little 
tapered toward the tip, and separated from the rest of the head by a ciliated depression. 
The palpi have two articulations, a basal and a longer distal. Four tentacular cirri occur 
on each side, the largest and longest being the posterior dorsal, and in each a nerve is distinct. 
The proboscis, which has a minutely papillose surface, is of a bright orange hue and extends 
to the fifth setigerous seement. Anteriorly it has a series of serrated papille. It is followed 
by the intestine, which is constricted at each dissepiment. 
The body varies in leneth from 6—10 mm., is typical in outline, and terminates posteriorly 
in two long articulated anal cirri and a median process. The general aspect is pale, with 
symmetrical brownish bars and two median touches in each segment. De St. Joseph 
describes the proboscis as unarmed, and furnished with numerous papille at the tip. The 
feet are well-developed, and, at the reproductive season, the ova pass into them. Dorsally 
is the long, articulated cirrus, and ventrally the shorter ventral cirrus. At the base of the 
former is the dorsal setigerous process, having a series of long, simple, slightly curved bristles 
(Plate CXXXIV, figs. 9 and 9a) with a serrated (spinous) edge, the process being further 
stiffened by two spines, one of which, curved in the young form, projects amongst the bristles. 
The ventral series has articulated terminal pieces, more or less bifid, and longer or shorter 
according to position, the longer dorsal and the shorter ventral. 
