PYCNOGONIDA. 25 
The Legs are not very long, extending to nearly 11mm. from the trunk. Of the 
three coxe, the second is as long as the other two together, the first being by a little the 
smallest ; the proportions of the remaining joints being 4:5:6:0°75:2. The terminal 
claw is large and stout, with two well-developed auxiliaries. The lateral line is distinct 
throughout. The sete have a rather indistinct linear arrangement, those on the 
sides of the coxe are prominent, especially on the second; on the third they are more 
confined to the ventral surface, and the distal fringe is fairly well developed. On the 
femur the sete are long and straggling, chiefly lateral, and ventrally there is a row of 
small tubercles. On the two tibize, but more especially the second, the setze are most 
abundant, largest on the first. Ventrally they are much smaller, the distal fringe of 
the second tibia becoming spinous. The tarsus is a very short joint with lone sete 
dorsally, smaller and more numerous ones ventrally, which become delicate spines 
distally. The propodus is covered with setee dorsally, and ventrally there is a row of 
rather strong spines, and of these the middle ones are strongest. 
The single specimen is a male, carrying young, apparently just hatched. The 
Genital apertures are to be found on the second coxe of the two posterior pairs 
of legs. 
From the root of a Laminarian taken in 17 fm., Cape Adare, 24th February, 1904. 
NYMPHON FRIGIDUM. 
(Plate III., fig. 4; Plate X., fig. 10.) 
Specific characters :— 
Body very slender, with lateral processes long and very widely separated. 
Ocular tubercle very short, stout. 
Palps five-jointed, proportions of last three 3: 1:5: 3. 
Oviger ten-jointed, denticulate spines not very numerous, with five to seven lateral teeth. 
Legs long and slender, propodus with ventral row of spines, a large terminal claw and two 
auxiliaries. 
Body well built, perfectly smooth, with the lateral processes widely separated and 
rather long, much more slender than the trunk. 
The Cephalon is rather long, with a distinct neck and expanded anteriorly into 
the two normal lobes. 
The Abdomen is short, directed obliquely upwards, and not projecting beyond 
the posterior pair of lateral processes. 
The Ocular tubercle is stout, very short, and bears four well-developed eyes. 
The length of the body is 2mm., and its extreme width is 1* 2mm. 
The Proboscis is cylindrical, directed downwards. 
The Chelifori comprise a single-jointed scape, slender, and covered with a small 
number of fine setee. The chele are well developed, the palms being about half their 
length, and setose ; the fingers are not much curved, provided with a number of teeth, 
not very closely set, and of uniform size. 
The Palp is five-jointed and rises underneath the chelifori (fig. 4a). The first 
PZ 
