60 THE VOYAGE OF H.M.S. CHALLENGER. 
The proboscis is inserted ventrally on the cephalothorax, at a considerable distance 
from the front margin; it is of a distinctly ovate form, and bears the small triangular 
mouth surrounded by slightly swollen lips. 
The mandibles are represented by one-jointed robust club-shaped bodies, placed at 
the front margin of the cephalothorax on both sides of the oculiferous tubercle, but not 
reaching quite so far as that organ. The mandibles are covered all round with strong 
hairs, placed at right angles to the surface, and when the mandibles are viewed from 
below and anteriorly, the round cicatrice is observed where in all probability, at an earlier 
date, a second joint has been inserted. 
The palpi are nine-jointed and placed close to and on both sides of the base of the 
proboscis. The first joint is very short, the second is the longest of all and directed 
forwards, the third again is short, the fourth almost as long as the second, and bent so as 
to form an angle with the first three jomts. The fifth joint is again very short, the 
four last joints are nearly of the same length ; the sixth, however, is the longest, and the 
eighth the shortest. All the joints are furnished with very strong hairs, which are 
longest on the third and fourth joints, and decrease in size though not in number 
towards the extremity of the appendages. 
The ovigerous legs are strongly curved. Of the first three joints, which are not 
so very small as is the case in other genera, the second is the longest, being nearly 
twice as long as the first. The fourth and fifth joints are nearly of the same length and 
are the longest of all. The sixth is not quite half as long as either of the two foregoing 
joints; of the seventh to the tenth the first is the longest, the second much shorter 
and the third a little shorter, while the last joint is extremely small and may easily 
be overlooked. The first three joints are almost smooth, the two following are furnished 
with very small hairs, and the sixth to the tenth with not very numerous but longer 
hairs. The last joint but one is armed with one, the last with two not very strong, 
comparatively broad, and slightly serrated spmes. The total length of the ovigerous 
leg is not quite so long as that of the body without the abdomen. 
The legs are comparatively strong and very hairy (Pl. VII. fig. 6). The lateral 
processes are furnished with numerous small and curved spines; the first three joints of 
the leg are small and nearly of the same length. The fourth joint is twice as long as the 
third, and on the dorsal surface beyond the middle it bears a tubular process, directed 
backwards towards the origin of the leg. The fifth and sixth joints are the longest in 
the leg, and are nearly of the same length. The fifth joint, however, is a great deal more 
slender than the fourth, and the sixth much more so than the fifth. The first tarsal joint 
is extremely small, the second long and distinctly curved ; the claw is scythe-shaped, 
and accessory claws are wanting. All the joints are furnished with long and strong 
hairs, standing at right angles to the surface ; the last joints are covered with much more 
delicate hairs. 
