•280 
THE VOYAGE OF H.M.S. CHALLENGER. 
fibres inferiorly in the same direction. Large dilatations of the blood-vessels occur 
anteriorly at each side of the alimentary canal. 
This species approaches Marenzeller’s Eunice microprion ^ in the sparsely jointed 
tentacles, in the shape of the feet, the number of the branchial divisions, and also in the 
compound bristles (“ Sichelborsten ”) ; but it differs in having dorsal bristles without a 
distinct wing, whereas in Eunice microprion the wings are j)resent. The posterior hooks 
also diverge to a certain extent. Moreover, in Eunice microprion the branchise com- 
mence as processes of three divisions on the sixth foot. The teeth of the great dental 
plates are more numerous in the new form, and the shape ' of the posterior processes of 
the maxillae also differs. 
Eunice edwardsi,^ n. sp. (PI. XXXVIll. figs. 14, 15 ; PI. XXa. figs. 4-7). 
Habitat. — Dredged at Station 145 (off Prince Edward Island) ; lat. 46° 43' S., long. 
38° 4' 30" E.; surface temperature, 41° ; depth, 140 fathoms ; sea-bottom, volcanic sand. 
A species of moderate dimensions, measuring between 70 and 80 mm. in length, and 
having a diameter of about 4 mm. at the anterior third. 
The head (PI. XXXVIll. fig. 14) is characterised by tentacles of average length 
(the median reaching the third foot), moderately thick, though slightly tapered, and 
divided by constrictions into segments. The others have the usual proportions. The 
outer, however, are broken. The tentacular cirri are large and long, extending 
considerably in front of the anterior border of the buccal segment. The constrictions in 
these are wide apart, and perhaps the same exists in the others, for their preservation is 
less satisfactory. The frontal lobes are notched, but not deeply. In front of the outer 
tentacle is a distinct ocular spot on each side, and behind it (close to the outer side of 
the base of the inner tentacle) is a well marked eye. 
The buccal segment is equal to about two of the succeeding, and its posterior moiety 
bears the cirri formerly mentioned. Its lobes are not much developed inferiorly and 
laterally. 
The dental apparatus (Fig. 39) is pale brownish, with darker touches. The maxilla3 
offer no peculiarity. The left great dental plate has eight teeth, and the same number is 
found on the right. The left lateral paired plate has six, and at the end are two 
accessory plates. The left unpaired lateral has nine teeth. On the right lateral plate 
are eleven teeth, and two accessory jDlates. In the mandibles (Fig. 40) the dentary 
region is petaloid inferiorly, and its cutting edge has one or two irregular elevations. 
The branchiae are represented on the third segment by a small simple process. The 
latter increases in size to the tenth, where it is still a simple filament, rather more than half 
1 Siidjapan. Annel., p. 27. 
2 Called after Prof. Milne-Edwards, who formerly did mucli good work amongst the Annelids. 
