428 PKOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1885. 



era! antennsB. (In the specimen described it may have been lost and 

 reproduced.) The eyes are black, rather conspicuous, and situated be- 

 tween the bases of the lateral autennaB. The anterior part of the buccal 

 segment is not much elongated on the dorsal side, or scarcely longer than 

 the posterior half j its anterior dorsal margin is deeply concave behind 

 the antennae, but on the sides advances toward the anterior margin of 

 the head so as to partially cover the eyes and sides of the head. The 

 posterior portion of the buccal segment is about equal in length to the 

 succeeding segments, it bears a pair of slender, tapering tentacular 

 cirri, which extend forward to the front margin of the head and are 

 about equal in length to the lateral antennae, though somewhat more 

 slender. The parapodia of the first segment are small and have a small, 

 conical, tapering, dorsal cirrus and a ventral cirrus of the same form, 

 but shorter and less acute at tip ; the setigerous lobe is rudimentary. 

 On the next two segments the dorsal cirrus becomes long, slender, and 

 tapered to the tip, and the ventral cirrus is elongated, round, somewhat 

 fusiform and subacute at tip. The setigerous lobe on the second seg- 

 ment is small and bears a cluster of setae ; it increases in size and num- 

 ber of setSB on the following segments. On the sixth and succeeding 

 segments the ventral cirrus has the base thickened and swollen ; this 

 graduallj^ increases in size, while the terminal portion diminishes in 

 length and becomes reduced to a low, conical tubercle, but on the pos- 

 terior segments it again becomes a small, round, tapered papilla. The 

 caudal cirri are long, very slender, tapered to a fine tip, about equal in 

 length to the twelve last segments. 



Station 865, 1880, and 943, 1881, in 65 and 157 fathoms. 



This species is named in honor of Mr. J. E. Benedict, of the United 

 States Fish Commission. 



Leodice polybranchia Verrill. 



Verrill, Proc. U. S. Nat. Mus., vol. iii, p. 357, 1830. 



Verrill, Traus. Conn. Acad., vol. iv, p. 323, pi. 14, tigs. 7, 7a, 7b. 



Verrill, Report U. S. Fish Com. for 18«3, [p. 22], pi. 41, fig. 180, a, h, 1885. 



Body large, much elongated, composed of very numerous short seg- 

 ments, much thickened and rounded anteriorly; somewhat depressed 

 and tapered in the middle and posterior regions. The anterior segments 

 are much shorter and closer than those behind the middle. The dorsal 

 surface of the anterior portion of the body is convex ; the ventral sur- 

 face usually has a shallow median groove. The body is broadest a 

 short distance back from the head, gradually increasing in breadth from 

 the buccal segment to the tenth to twelfth body-segments. 



The head is short, rather narrow, deeply emarginate or bilobed in 

 front, and bears five slender, tapering antennae, of which the three up- 

 per are nearly equal and about three or four times as long as the lateral 

 ones. The two frontal lobes or palpi are broadly rounded in front, 

 thick, and turned somewhat downward. The buccal segment bears on 



