350 
THE VOYAGE OF H.M.S. CHALLEHGEE. 
tips are pale, and have the translucent minutely granular appearance observed in the 
finely tactile processes of other Annelids. 
The proboscis is remarkably short, forming a cup-shaped organ in extrusion, and 
densely villous under a lens. When more highly magnified the papillae appear very 
elongate, almost linear, the tip, however, being slightly bulbous. All are marked by 
longitudinal bands, apparently fibres, and are densely granular. The tips of many 
exhibit slight processes, as if from palpocils, or the extrusion of the secretion after 
immersion in spirit. Like the tentacles these papillae are the longest yet observed in the 
group. The four teeth are remarkably short, curved, and sharp. They differ from those 
of Glycera tesselata (from Fayal, Azores) in the form of the base, for the long slender and 
nearly horizontal arm shows no marked projection towards the median line (of the 
proboscis) where it joins the base of the fang. Moreover, the direction of the l)ase-line 
on each side is more nearly horizontal than in the common form. 
The feet diverge from those of the ordinary Glyceridae. At the tenth the dorsal 
cirrus is considerably elevated, and has the form of an ovoid pedicellate process. The 
foot is nearly sessile, and bears anteriorly a dorsal lamella of considerable length, the tip 
being narrower. A shorter inferior process of a similar shape also occurs. Posteriorly 
the corresponding structures are short and rounded. Ventrally is a well-marked ovate 
lamella, much resembling the corresponding organ in the Phyllodocidse, to which family, 
indeed, the short head of this species and the bristles of all somewhat approach. The 
variations of the foot from the foregoing to the nineteenth consist of a gradual diminution 
of all the processes, and the more sessile condition of the entire organ. Two spines occur 
in the latter. 
The dorsal bristles {e.g., of the twentieth foot) are simple, slender, elongate, and 
nearly of the usual structure. They are, however, much more boldly serrated along the 
edge than any yet seen. The lower ones also show a slight hook at the tip, and are 
less slender (PI. XXIIa. fig. 12). The surface, moreover, is slightly though minutely 
spinous. 
The ventral bristles in the same foot form two very distinct groups. The superior 
have longer tips than the inferior, but even these are considerably shorter and stouter 
than any hitherto observed in the Glyceridse. Their shafts have nearly the ordinary 
structure, while the terminal process is sabre-shaped (PI. XXIIa. fig. 13), and the edge 
is not only boldly spinous, but the surface of the process is minutely hispid, and a 
tendency to this condition a23pears in other groujis of bristles. A slight hook also occurs 
at the ti]3, es 2 )ecially in the lower forms. 
The inferior ventral bristles present short, broad tips, sj^inous at the edge and over 
the surface, and have a distinct terminal hook. The superior and inferior possess longb- 
tips than the central (PI. XXIIa. fig. 14). The upper ends of the shafts have two very 
strong articular jDrocesses in front. 
