I 9 I 



distinctly curved. Hairs on outer surface long, and distributed over a large portion, situated at 

 some distance from one another, and consequently not very numerous. The tuft formed at 

 the distal and upper angle not very dense. Numerous hairs are disposed along upper margin 

 at small distances from one another, short curved ones are scattered near upper margin over 

 the inner surface. 



Mandible (PI. XVII, fig. 17) has the third tooth stronger than the fïrst and second. 

 Distance between extremities of first and second teeth greater than that between extremities 

 of 2 nd and 3 rd teeth. Fourth tooth small, fifth confluent with inferior angle, or, though small, 

 separated from it. 



Maxilla (PI. XVII, fig. 18 and [8*) with the two inferior spines not on a step-like 

 projection; notch behind upper spines very small and a spine-like hair inserted at its bottom. 

 Between the two pairs 6 to 7 spines are disposed in a single row along the nearly straight edge. 



Outer maxillae (PI. XVIII, fig. 1) have the outer lobe broad, short, with the 

 interior margin straight, exterior margin arched, the two meeting in an obtuse angle, which makes 

 it look somewhat pointed at the extremity. The inner lobe is short and not distinctly separated 

 from the outer lobe. Hairs are disposed on distal part of surface and along inner margin only 

 of outer lobe, with a longitudinal series extending from the outer to the inner lobe. Hairs on 

 inner lobe not very numerous, most of them directed inwards and downwards, and more distinctly 

 feathered than the other hairs of this maxilla. 



Cirri. First pair has unequal branches of 6(7) and 12 segments respectively. The 

 segments of the shorter ramus are only slightly protuberant, the last one bears a few spines 

 which are stronger than those of the other segments. The last segment of the longer ramus 

 has a few (3 to 4) very long hairs, which look somewhat like spines, disposed on its extremity. 



Second pair has 9 (10) segments in each ramus; the somewhat shorter ramus has 

 the outer segments protuberant and that part of the ramus recurved in a curious way. 



Third pair has nearly equal rami of 10 to 11 segments; a few very strong and long 

 spine-like hairs disposed at the extremity of the terminal segments. No tracé of teeth along 

 anterior face of segments. 



Fourth -si xth pairs of cirri of about the same structure, the number of segments 

 only slightly increasing from the 4* to the last. 



Si xth pair has 21 segments in each ramus; the distal segments are longer than the 

 basal, but all of them longer than broad. Most segments (PI. XVII, fig. 19) bear three 

 pairs of spines on their inner faces, two pairs of long ones, and a third (the lower) pair of 

 rudimentary spines. A few spines (forming together a little tuft) are disposed between the two 

 of each pair of longer spines. Hairs on the dorsal surface of each segment, close to its upper 

 margin, not quite three-fourths of the length of the segment itself. 



Penis broken off and lost in the specimen I investigated. 



This species was observed at : 



Stat. 105. July 4, 1899. Lat. 6° 8' N., Long. 1 2 1° 19' E. Depth 275 in. Coral-bottom. A large 

 incomplete specimen and a small one attached to it. 



Geographical and b a t h y m e t r i c a 1 distribution. This species, which was founded 



63 



