PYCNOGONIDA. 17 



The Leg attains a length of 32mm. Of the three coxae the second is about as 

 long as the other two together, and is much enlarged distally. The first bears a 

 mid-dorsal row of a few long seta) and a distal fringe of the same kind. The second 

 bears two dorso-lateral rows and t lie distal fringe ; and ventrally, a conspicuous fringe 

 between the distal extremity and the genital apertures. The third coxa is covered 

 ventrally and laterally with setae and carries ventrally a very prominent distal fringe. 

 The proportions of the three following joints are 8 '5 : 8 '5 : 10, these joints are covered 

 with lines of very long slender setae, their great length making it difficult to determine 

 the precise number of rows. On the femur they are most abundant ventrally, except 

 near the distal extremity. On the two tibiae the ventral surface is much more scantily 

 supplied. The distal fringe of the second tibia is rather spinous ventrally. The 

 tarsus is very small, setose, and with a few spinous setae at its ventral extremity. 

 The propodus is curved, covered with rather short setse, a fringe of longer ones distally ; 

 there is no heel. Ventrally at the proximal end of the joint are two or three stout 

 spines, and a baud of smaller ones of irregular size extends to the end of the joint. 

 The terminal claw is long and slender, with two well-developed bub not large auxiliaries. 

 Small setae also occur more or less abundantly throughout the limb. 



The Genital apertures of the female occur on the enlarged part of the second coxa 

 of every leg. In the male these orifices occur at the apex of a pointed tubercle on the 

 two posterior legs only. The male as a rule is more setose than the female, and on 

 the mid-ventral surface of the femur there is the duct so characteristic of the males of 

 this genus ; in this species it is long and slightly twisted, conspicuous even among the 

 long setae. The joints of the ovigers up to the sixth joint are more strongly developed, 

 longer, and all are more setose than those of the female. One specimen has three 

 perfect ovigers, two on one side being in contact with one another. The eggs are 

 rather large, and held round each oviger in a single rounded mass. 



Several specimens of this species were taken off the Ice Barrier in the Eoss Sea, 

 300fm., mud bottom. I am unable to find any satisfactory reason for separating them 

 from the species of Dr. P. P. C. Hoek. They are smaller, and the only character which 

 can be used to separate them is the comparative length of the four terminal joints of 

 the oviger, but this does not seem to me to be sufficient. 



PALLENOPSIS HIEMALIS. 

 (Plate I., fig. 4; Plate II., fig. 3.) 



Body well built, with lateral processes widely separated, but of variable length, and having a 

 tubercular swelling at the dorsal extremity. 



Chelifori and abdomen both proportionally long. 



Palps, a rather long stump. 



Legs clothed with short, stiff sette. 



Body well built, with the lateral processes rather widely separated, as long as the 

 trunk is broad, and each bearing distally a stout tubercle of no great elevation. 



o 2 



