PYCNOGONIDA. 61 



certain joints. The third joint of the palp is distinctly less than twice the length of 

 the fifth, and the fourth joint of the ovigerous leg is a little longer than the sixth. 



The nearest ally of this species seems to be C. proboscidea, Sabine, from which, 

 however, it may be instantly recognised by the wider intervals between the lateral 

 processes and the presence of well-developed eyes. 



Two specimens of this species were taken, one off Cape Wadworth, Coulman Island, 

 8-15 fm.; bottom : stones ; the second off Mounts Erebus and Terror, 500 fm.; bottom : 

 stones. 



This latter specimen is the carrier of some half-dozen cirripedes of the genus 

 Scalpellum. 



COLOSSENDEIS GLACIALIS. 



(Plate IX., fig. 2 ; Plate X., figs. 3 and 4.) 

 Specific characters : — 



Body apparently smooth, with lateral processes widely separated, and four well-developed eyes. 

 Proboscis not quite so long as the trunk, slightly dilated about the middle, and covered with short 

 spinous setse. 



Palps, three terminal joints sub-equal and densely setose, with wide and deep constrictions at 

 the joints. 



The body is rather stouter proportionally than the last two species, and though 

 apparently smooth, a lens reveals a median row of extremely minute setse. 



The Cephalon is not expanded beyond the average width of the body. 



The Ocular tubercle is stout, and bears four eyes, the anterior pair larger than the 

 posterior ; the portion above the eyes is acutely pointed, but this feature is variable 

 in size. The setous character of the proboscis is not always easily discernible ; in one 

 specimen it is prominent, in others less so, even when not concealed by a growth of 

 polyzoa. It can hardly be said that these setse are arranged in any definite manner, 

 but in places they give the impression of ill-defined rows. 



The Abdomen is short and articulated to the trunk. The Proboscis is as defined 

 among the specific characters and flexibly united to the trunk. 



The Palps arise on the ventral side of the proboscis (fig. 2) ; the first joint is 

 rather more prominent than usual, and is readily seen from the dorsal surface. The 

 second joint is shorter, the third is considerably the longest of the appendage, the 

 fourth is quite short, and the fifth is approximately two-thirds the length of the 

 third ; this joint has a faint constriction at about two-thirds of its length. The 

 following joint is short, the next a little longer, the three terminal joints being short 

 and sub-equal. The extremity of the palp has a peculiar appearance, owing to the 

 seventh, eighth, and ninth joints, and to a less extent the sixth, having their distal 

 extremities rounded off like the shoulders of a wide-mouthed bottle, so that each 

 joint seems balanced on a narrow base. The entire appendage is beset with stiff setse, 

 almost spinous in character. On the third joint they are short, somewhat sparsely 

 distributed, and appear to be arranged in rows. A whorl of stouter setse (spines ?) 



