68 THE VOYAGE OF H.M.S. CHALLENGER, 
Description.— 
Length of the proboscis, . E ; 20 mm. 8 mm. 13:5 mm. 17°5 mm. 
Length of the trunk, ; : j 10:5). 8. i ee 10D. 
Length of the abdomen, . 5 . 2°5 5, Dixs Ns Ye ie ee 
Total length of the body, . : : Domes, 
Length of the palpus, : ; ‘ 26° 55 
Length of the ovigerous leg, : - SOEs. 
Length of the leg of the third pair, : Qi 
The proboscis of this species is club-shaped, a little bent over to the ventral side ; 
longer than the trunk with the abdomen. The cephalothoracic segment is comparatively 
small, and not distinctly divided into a cephalic and a thoracic part. Between the 
lateral processes of the thoracic joints large intervals are to be observed. The oculi- 
ferous tubercle is large and high, conical, furnished with four eyes. Of these, two are 
very large and directed forwards, while the two directed backwards are a great deal 
smaller and in all probability are rudimentary. The abdomen is small, only 1-13th 
of the total length of the body. 
The palpi are slender, and the lengths of their joints are not very characteristic. 
The third joint is much longer than the fifth, and of the three last joints the eighth is 
very small, the ninth and tenth considerably longer. In the ovigerous legs the fourth 
and sixth joints have nearly the same length, while the fifth is not quite half as long. 
The four last joints are small, and nearly equal in length, growing however a little 
shorter and more slender towards the tenth joint. The claw is very short. 
The distribution and form of the denticulate spines is in this species very charac- 
teristic. There are two rows of comparatively long and flat spines, the margins of which 
show when greatly magnified very minute hairs; in addition to these two rows a 
moderate number of smaller flattened spies are found scattered over that side of the 
four last jomts which is bent inwards. I have figured these two rows and the irreeu- 
larly placed spines in figure 3 on Plate IX. 
The legs are not very long, nearly three times as long as the body in the 
adult specimen, while the younger specimens have them much shorter. The 
three first joints are: very short, the fourth is the longest, viz., 23 mm.; in a leg, the 
fifth jomt of which measures 21 mm., the sixth is 18 mm. The two tarsal joints 
are together as long as the sixth joint. The claw is large, almost as long as the second 
tarsal joint. 
The surface of the body and of the legs is almost entirely smooth. The palpi 
show only very small hairs, and on the ovigerous legs hardly any hairs are to be 
observed. 
Of this species seven specimens were dredged. They are, I think, all young ones 
with the exception of one specimen which is a male. It shows genital pores ventrally 
on the second joint. of all the legs. 
