REPORT ON THE ANNELIDA. 
285 
Eunice torquata (?), De Quatrefages (PI. XXXVIII. fig. 18 ; PI. XXa. figs. 11—13). 
Eunice torquata, De Quatrefages, Anneles, t. i. p. 312, 1866. 
Habitat . — From St. Vincent, Cape Verde Islands, July 1873. Probably a shore- 
form. 
The specimen measures about 90 mm. in length and about 7 mm. in diameter (over 
the ventral cirri) anteriorly. It is in two fragments, and the tail is absent. 
The head has two deeply bifid lobes, which in the preparation are still reddish- 
brown superiorly. The tentacles are of moderate length, and all deeply ringed. The 
tentacular cirri extend in front beyond the margin of the buccal segment. The single 
large eye occupies the usual position on each side. 
The dental apparatus is dark brown, with a few lighter touches. The maxillae (Fig. 44) 
have a distinct median ridge near the tip, and, as 
usual in the larger forms, the curvature is moderate. 
The left great dental plate has five teeth, the right 
the same number, but the first and last are small. 
The left lateral paired plate shows four teeth, and 
the first accessory plate forms another conical tooth 
next it. The unpaired lateral plate of that side 
has five teeth. The right lateral plate, presents 
eight teeth, and, as in the former case, the first 
accessory plate is toothed. The shape of the 
posterior or basal piece of the maxillae is peculiar, 
a notch occurring in the rounded posterior margin. 
The mandibles (Fig. 45) present a somewhat rhom- 
boidal dental plate ventrally. 
The buccal segment is broad ; the portion from 
which the tentacular cirri spring being narrow. 
The fourth and fifth segments (reckoning the buccal as the first) are pale, all the rest 
being pale reddish-brown. They thus appear to have been whitish during life. 
The branchiae are represented on the fourth foot by a simple filament, and rapidly 
attain full development. The fifth foot has a process bearing three divisions, and these 
increase to four on the sixth foot. The branchia on the tenth has six divisions, and 
its form is that of a broad and short arbuscle. The lower branch is about as lone; as 
the dorsal cutus, and the second is only a little shorter. The twentieth foot has five 
divisions, the thirty -sixth (PI. XXXV 111. fig. 18) three, and the same number occurs 
on the fiftieth and seventieth. They diminish to a single process near the tail, and 
disappear before reaching the latter. 
Fig. 44.— Maxillae and dental plates of Eunice 
torquata, De Quatrefages ; x 12 diameters. 
Fig. 45. — Mandibles of the same species, from the 
ventral surface ; x 12 diameters. 
