32 T. V. HODGSON. 



is stout, iiot half the length of the joint that bears it, and provided with two small 

 auxiliaries. 



The specimen described above is an adult female with Genital apertures on the 

 second coxae of all the legs. Nearly mature ova can be seen in the femora. 



It was taken in Winter Quarters, in 125fni., 24 April, 1903. Bottom : small stones, 

 organic debris, polyzoa, shells, etc. Other specimens, generally smaller, were taken at 

 the same place on various dates, and also at other points three and nine miles away, and 

 at the same or greater depths, 180 fm. They all appear to be sexually mature, and 

 differ in a varying degree from the type in their spinose character. In all cases this 

 is more conspicuous in the males. The Genital apertures of the male are on the two 

 posterior pairs of legs only. 



The numerous minor features which separate this species from the preceding 

 cannot, in my opinion, be ascribed to age. The form of the ocular tubercle readily 

 separates the two. 



A specimen was taken in 125 fm. on 3 May, 1903, and is, I think, a young form 

 of this species. The differences between this specimen and the adult individuals are : 



The posterior articulation of the trunk is present, but very much less distinct than 

 the others. 



Palps : the second joint is as long as the three following together. The third joint 

 is as long as the two terminals together, and of these the last is a little the longer. 



Ovigers : these are quite rudimentary, small, and hook-like ; no joints are 

 differentiated, though two are indicated. 



Legs : the proportions of the joints differ somewhat and are, beginning with the 

 femur, 6:7:7: 2'25 : 3'5. The limb is clothed with comparatively strong spiuous setse 

 of some length, not very numerous, arranged in lines. 



CH^TONYMPHON AUSTRALE. 

 (Plate X., fig. 14.) 



Nymphon austrrth, Hodgson (10), p. 257. 

 Chcrtonymphon ciUiomlatum, Mobius (23), p. 181. 

 Specific characters : 



Body robust, with lateral processes not widely separated but divergent ; entire animal rather 

 coarsely setose. 



Ocular tubercle long and slender. 



Palps five-jointed, proportions of last three as 7 : 4'25 : 4. 



Oviger ten-jointed, denticulate spines fairly numerous, with four distinct lateral teeth on each side. 



Legs short, tarsus a little longer than the propodus, the terminal claw with very miiiute auxiliaries. 



Body robust, with stoutly developed lateral processes, which are distinctly though 

 not widely separated, the interval increasing with age ; the body, exclusive of the 

 anterior part of the cephalon, forming an oval of graceful proportions. 



The Cephalon is expanded, and the space between the chelifori is marked by a deep 

 groove, wide anteriorly. The neck is well defined, and behind this is the Ocular 



