60 T. V. HODGSON. 



joint, but these are either inconspicuous or absent on the four terminal joints. With 

 regard to the characteristic groups of spines on the four terminal joints, there are four 

 rows on the three proximal joints and three only on the terminal joint. In both 

 specimens the spines are so much worn as to give but a feeble idea of their true 

 character (Plate X., figs. 1 and 2). The large size of the sockets in which they are 

 planted is remarkable. The most ventral row, that which lies nearest the sea 

 bottom in the natural position of the animal, comprises a small number, less than a 

 dozen, of large stout spines. The second row, which in this species is not separated 

 from the first by any conspicuous interval, contains approximately double the number 

 of smaller spines ; the sockets of this row are sometimes crowded together, and the 

 spines are smallest and most crowded at the proximal end of the joint, and are also 

 deflected from a straight line by the articulation of the succeeding joint. Two other 

 rows follow, but these have not the mathematical regularity of the former, nor are 

 they so much deflected ; they are reduced in number, but not in size. In structure the 

 large spines appear to consist of a stout base almost circxilar in section and composed 

 of a strong chitinous investment having a protoplasmic core ; the spine tapers to 

 a blunt point much worn, but with enough left to indicate a flattened blade at the 

 extremity. 



The Leg attains a length of 115 mm. The three coxse may be regarded as 

 sub-equal in size, and short. The two tibiae are the longest joints and sub-equal, except 

 in the first leg, where the second tibia is a trifle shorter than the first. The femur is a 

 little shorter, and the tarsus less than half the length of any of the three preceding 

 joints ; the propodus is just over half the length of the tarsus. On the first coxa 

 there is dorsally and ventrally a median line of reddish colour, which appears to 

 indicate the presence of a slight groove. On the second coxa the lateral line begins 

 on each side of the joint, and passes to the extremity of the limb. The three coxse 

 are minutely scabrous and possess a small fringe of minute spines at their distal 

 margins. The remaining joints are more or less covered with these fine spines, 

 which become a little more conspicuous as the extremity of the appendage is reached. 

 Six rows are fairly well defined throughout the limb, a median dorsal, a median ventral, 

 and two lateral, one on each side the so-called lateral line. The distal extremity of 

 each joint bears a fringe of spines on the inside of the bend, largest and most 

 conspicuous on the second tibia. The terminal claw is small, less than half the 

 length of the propodus. 



The Genital apertures occur on the second coxa of all the legs in both sexes, 

 as shown in figs, lb and Ic. 



The above description has been prepared from an example taken in deep water. 

 Another from shallow water presents certain difi"erences : first, it is more spinose, 

 especially the proboscis and the limbs ; on the legs four additional irregular rows of 

 spines may be distinguished between the six described for the deep-water specimen, 

 two of these are dorsal and two ventral : and secondly, in the comparative length of 



