64 T. V. HODGSON. 



angle. In its perfect condition it is rather long and slender, especially the distal 

 half. Something like one-half of this slender portion, at the tip of the claw, is 

 flattened dorso-ventrally to form a sort of protective shield to a thin membranous fold 

 lying like a knife-edge on the under surface of the claw throughout its distal half 

 (fig. 3a). The claw is covered with very minute hairs. The characteristic spines are 

 very numerous, and are arranged in two sharply defined lines followed by a closely 

 arranged group in which five rows can be distinguished. A distinct interval separates 

 the first two rows from each other and from the group referred to above. The 

 spines of the first row are long, slender, lanceolate in shape, and set as closely 

 together as possible (Plate X., figs. 5 and 6). Those of the second row are approxi- 

 mately double in number, shorter and more spathulate, their essential structure being 

 the same. They have a fairly stout base tapering to the centre, where it becomes 

 a flat blade, the entire margin of which is provided with minute teeth visible 

 under a one-inch objective. In the group of spines there are five rows arranged 

 in an imbricate manner and as the spines of these rows alternate fairly regularly 

 oblique rows of eight spines may be distinguished in the broadest part of the group, 

 In structure they resemble those of the second row. Setse are sparsely distributed 

 over the appendage and though very minute they are not difficult to distinguish. 



The legs of the numerous specimens average between 58 mm. and 106 mm. in 

 length ; the proportions of the joints do not, however, vary greatly. The first coxa 

 bears a reddish line marking a very shallow groove dorsally and ventrally ; the lateral 

 line begins on each side of the second coxa, and is continued to the extremity of the 

 limb. The three coxse are 'sub-equal. The femur is the largest joint of the limb 

 as a rule, the other joints decreasing in size to the extremity. The claw is about half 

 the length of the propodus. 



The Genital apertures occur on the second coxa of all the limbs of both sexes. The 

 legs are apparently quite smooth, even to the touch, but close examination shows faint 

 traces of rows of setse. In some of the larger specimens these are a little more conspicuous. 



Specimens of this species were taken in Winter Quarters in depths varying from 

 5 to 178 fathoms, and the name is derived from the fact that two of them had to be 

 taken to the ship dry, a distance of nearly two miles, at a temperature of - 50° Fahr. 

 They saff'ered in consequence. Another specimen taken in 300- fathoms ; bottom, mud ; 

 off' the Barrier, 27.1. '02, is referred to this species. 



COLOSSENDEIS RUGOSA. 



(Plate IX., fig. 4 ; Plate X., fig. 7.) 

 Specific characters : — 



Proboscis half as long again as the body, slender, dilated about the middle, with a median row of 

 curved spines dorsally along the proximal half. 



Body smooth, with lateral processes widely separated, and, with the first coxa, dilating distally. 

 Palps 10-jointed, the eighth very short ; the ninth rather more than twice its length ; the terminal 

 one a little larger still. 



Legs provided with rows of spines, claw large. 



