20 
T. Y. HODGSON. 
✓ 
Another specimen, a male, was taken in Winter Quarters, inside the 20-fm. line 
before the ship was frozen in. It is in a severely mutilated condition, having lost the 
posterior segment of the trunk and several legs. It differs slightly from the male 
above described, the lateral processes being a little closer together and the body, 
especially the cephalic portion, being a trifle stouter, and the tubercular knobs on 
the lateral processes not being so distinct, but all these features can, I think, be 
readily accounted for by age. 
This species is closely allied to P. patagonica, Hoek. 
NYMPHON. 
This genus is perhaps the most widely distributed and best known of all the 
genera of Pycnogonida. It is readily distinguished from all others by the well- 
developed chelifori, the five-jointed palps, and the ten-jointed ovigers, the four terminal 
joints of these being provided with a single row of denticulate spines. The form of 
the body varies greatly within certain limits, and Professor Sars (25) has subdivided 
the genus into three :— 
Nymphon retains the more slender and comparatively long-legged species. 
Chsetonymphon the more robust and short-legged species, which also, as a rule, are 
more setose on the body than those of the original genus, Nymphon. 
Boreonymphon , another robust form, readily separable from the others by the 
absence of teeth on the chelae, the spines of the ovigers being simple and not 
denticulate. 
The species brought back by the ‘ Discovery ’ are eight in number; four are 
assigned to the original genus, though one of these, N. adareanum, bears a few simple 
spines on the oviger instead of the rows of denticulate spines. The other four, of 
which one, for the present at least, is regarded as a southern variety of a previously 
described species, are assigned to the genus Chsetonymphon. 
Nymphon hiemale. T 
(Plate III., fig. 1 ; Plate X., fig. 8.) 
Specific characters:— 
Body slender, with rather long lateral processes very widely separated. Limbs covered with very 
minute setse. 
Ocular tubercle stout and short. 
Palps five-jointed, proportions of last three as 7 : 4 : 5'5. 
Oviger ten-jointed, denticulate spines rather numerous, with eight to ten teeth on each side. 
Legs long, scabrous, terminal claw with well-developed auxiliaries. 
Body smooth, slender, with rather long lateral processes, which are very widely 
separated; the first of these is curved forwards. The segments are very strongly 
marked immediately behind the lateral processes. 
The Cephalon is long, the greater part of its length is taken up by a slender 
