52 T. V. HODGSON. 



curve in one direction, and tlie three following curve in another. Measured in their 

 extreme length the proportions of the various joints of the appendage are : 3:6:6:8: 

 7"T5 : 7 : 4 : 4 : 2"5 : 4. The third and following joints are all more or less covered with 

 very short stout setae on the outer side of their curvature ; these setae are most con- 

 spicuous on the fourth, fifth, and sixth joints, on the last of which they are also lateral. 

 The last four joints each bear a small number of stout but simple spines, 4:8:7:6, not 

 arranged in a single row. The last joint tapers to a blunt point, and is without a 

 terminal claw, a small group of these spines taking its place. 



The Legs attain a length of about 55 mm. Of the three coxae the second is twice 

 the length of the other two, the proportions of the remaining joints being 13*5 : 12 : 

 16 : 4, the last figure representing the tarsus and propodus together. The coxae are 

 densely clothed with very minute setae, but on the femur they are much larger, 

 though still small, and more conspicuous. They are arranged as a dorsal and a ventral 

 band, separated laterally by a considerable interval, along the centre of which is a 

 narrow band of similar setae. This arrangement is continued along the tibiae but it 

 is not so distinct on the second. The distal fringes are quite normal and incon- 

 spicuous. The tarsus is a very small cup-like joint, covered with spinous setae 

 ventrally, with a few prominent ones distally. The propodus is uniformly covered 

 with small spinous setae, but ventrally there is a row of stout spines running 

 the whole length of the joint. These spines are very irregular ; beginning from the 

 proximal end the first three or four rapidly increase to large dimensions, the rest are 

 very irregular in size, but none are so large as the last of the proximal series. The 

 joint terminates obliquely, the dorsal projection is not large ; the terminal claw is 

 stout, and its two auxiliaries are quite half as long, arising together from a process of 

 the oblique termination. 



The single specimen of this species is immature, and was taken in Winter Quarters 

 at a depth of 125 fathoms. 



AUSTEODECUS. 



Body stout, and distinctly segmented, with lateral processes close together. Ocular tubercle 

 anteriorly situated, long, with four well-developed eyes. 



Proboscis immovably articulated to the trunk and ventral in position ; long, tapering, slender. 



Chelifori absent. 



Palps 6-jointed. 



Oviger 6-jointed ? no terminal claw. 



Legs short ; genital apertures on the second coxae of all the legs in female. (Male as yet 

 unknown.) 



I have considered the affinities of this and of the succeeding genus in the intro- 

 duction to this memoir. 



