PYCNOGONIDA. 19 



the three following joints are 9 : 8'5 : 11 -5. The tarsus is very small, and of the 

 normal shape. The propodus is one-third the length of the femur, very slightly 

 curved. At the ventral side of the extremity is a stout claw, with two well-developed 

 auxiliaries ; the heel does not project beyond the insertion of these claws. The joint 

 is uniformly clothed with short spinous setae, and there is dorsally a projecting fringe. 

 Ventrally there is a row of stout spines, of which some half-dozen, not very regular 

 in their position, are very prominent (fig. 3). The entire limb is uniformly and 

 densely clothed with very short, stiff setae, and these, as is usually the case, are more 

 numerous and longer on the second tibia; the distal fringe on this latter joint 

 is prominent, with at least one stout spine ventrally. The ventral setse on the tarsus 

 are also spinous, one being particularly large. The lateral line is very prominent 

 from the lateral processes to the tarsus, both inclusive. 



The specimen is a female and bears Genital apertures on a swelling of the second 

 coxa of every leg. 



Winter Quarters, inside the 20-fm. line. 



A specimen was taken off Cape Wadworth, Coulman Island, which, notwithstanding 

 certain important differences, I cannot regard as being specifically distinct. It is a 

 male, and rather larger than the type. The obvious differences lie in the much 

 greater length of the lateral processes and the character of the ventral spines on the 

 propodus (fig. 3a). With regard to the first of these features, the third lateral process 

 of the right side is but little more than half the length of the others ; the first coxa, the 

 only joint of that appendage that exists, is also abnormally small, though there are no 

 definite traces of injury. The other feature rests on the armature of the propodus. 

 The ventral surface of this joint bears proximally three very stout spines, and from 

 there to the extremity is a band of spinous setse. 



The length of the body is 12mm., of the trunk only 9mm., and its extreme width 

 is 6mm., rather larger, especially in the last measurement, than the type. The 

 chelifori (scape) and the abdomen are a little shorter. The oviger diff"ers only in 

 being much stronger ; the setae are more numerous and also stronger. The fifth joint 

 is however longer, nearly equalling the fourth. This is a not uncommon .sexual 

 difference. The lateral processes and the first coxa exhibit in a less degree the 

 tubercular processes of the type. 



The proportions of the three principal joints of the legs are 9"75 : 8'5, and 12, 

 a difierence of no importance. These limbs are setose throughout, though the setse 

 are rather deficient proximally, becoming much more abundant on the tibia. Ventrally 

 they are very small, stiff, and crowded ; dorsally much less numerous. They have among 

 them a number of much longer and more slender setae. The tarsus is coarsely setose 

 ventrally, with one very prominent spine. The distal fringes of the joints are not 

 strongly developed ; that of the second tibia is chiefly ventral and spinous. The lateral 

 line is very distinct from the lateral process to the end of the second tibia. The femur 

 is swollen ventrally near the middle, and bears a very short but stout tubular duct. 



