28 T. V. HODGSON. 



third coxa being the most deficient in this respect. The distal fringe is well developed 

 ventrally on the second coxa, but more so on the third, and the ventral surface of this 

 joint is covered with small setae. The femur is short and stout, approximately equal 

 in size to the second tibia, the first being a little longer. The setse on these three 

 joints are arranged in a thoroughly characteristic manner. There are two dorso-lateral 

 rows and a lateral row, all of long, slender setse. There is also a ventral row of com- 

 paratively short setse, five rows in all. The setse are much better developed on the 

 second tibia than elsewhere. The distal fringes on these joints are normally 

 developed ; on the tibise they are ventral and spinous, more especially on the second 

 tibia. The tarsus and propodus are short and much more slender than the rest 

 of the limb. The two joints differ but little in size, the propodus being a little 

 the longer. This bears a stout terminal claw and two well-developed auxiliaries. 

 The setse of these two joints are small, but have the same arrangement as on the 

 other joints. The ventral row is, however, distinctly spinous, and a very prominent 

 spine exists at the ventral end of the tarsus. 



Only one individual of this species was taken, and its sex has not been determined. 



Coulman Island, 13 January, 1902 ; 100 fathoms, stony bottom. 



Ch^tonymphon biarticulatum. 



(Plate IV., fig. 2 ; Plate X., fig. 12.) 

 Specific characters : — 



Body stout, tapering posteriorly, articulation deficient, lateral processes separated by variable 

 intervals. 



Ocular tubercle long and slender. 

 Palps five-jointed, proportions of last three as 3 : 1 : 1. 



Oviger ten-jointed, denticulate spines not numerous, and with not more than five small teeth on 

 each side. 



Legs of moderate length, covered with rather fine setse, terminal claw with small auxiliaries. 



Body is stout and tapering posteriorly, with the lateral processes separated by a 

 moderate interval, except the last two pairs, which are quite close together, the articu- 

 lation between them being deficient. The distal extremities of the lateral processes are 

 provided with slender spines, but these have enlarged bases and thereby become more 

 prominent. 



The Cephalon is short and stout, a very distinctly constricted neck separating 

 the expanded portion, which forms two diverging lobes. 



The Ocular tubercle lies immediately behind the neck and in front of the first 

 pair of lateral processes. It is tall, slender, cylindrical, and bears four well-developed 

 eyes at the extremity ; there is no pigment. 



The Abdomen is rather long, narrow, tapering to a blunt point, and not separated 

 from the trunk by an articulation. 



The entire body is covered with very fine setse, not easy to distinguish, and in 

 addition there are two long setse dorsally near the posterior border of each segment, 



