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 circular 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 coxe may be regarded as 
sub-equal in size, and short. The two tibiz 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 ¢ 
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 coxze 
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 
ach 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. 1b and le, 
The above description has been prepared from an example taken in deep water. 
Another from shallow water presents certain differences: 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, 
iwo of these are dorsal and two ventral: and secondly, in the comparative length of 
