672 THE VOYAGE OF H.M.S. CHALLENGEE. 



larger spine at the hinge of the finger, four spinules on the hind margin ; finger together 

 with its purple nail half the length of the fifth joint. 



Fourth Perssopods. — First joint much longer than in the preceding pair, and more 

 narrowed below ; the f urth joint also much longer, the limbs in other respects being 

 very similar. 



Fifth Perseopods. — First joint wider and longer than in the preceding pair, its hind 

 border more convex, but the distal breadth equal to that at the base ; the rest of the 

 limb closely similar. 



P^eqpod'*.— The two coupling spines on the peduncles with, in some cases, as many as 

 five retroverted teeth on one margin, the opposite margin being serrate ; along with the 

 blunt-headed spines there are three or more sharp feathered ones ; the cleft spines of the 

 rami numbering from seven to five in a series, preceded by two slender plumose setfe 

 placed above them, both divisions of the cleft part very long and slender, the spoon- 

 shaped part much exceeded b) the other ; the joints of the rami numbering from seventeen 

 to twenty-one. 



Uropods. — Peduncles of the first pair somewhat longer than the longer ramus, 

 with numerous spines along the upper margins ; eight spines along the margin of the 

 longer ramus, six (or seven) along that of the shorter, both rami stiliform ; peduncles of 

 the second pair scarcely as long as the longer ramus, which has ten spines on one margin, 

 five on the other ; peduncles of the third pair shorter than the rami, with a group of short 

 spines at the outer corner ; the rami short, broad ; the upper lying flatly over the lower 

 and reaching almost to its nail, with five little spines on each border, the apical portion 

 forming an equilateral triangle, of which the tip is sharp but not in any way outdrawn ; 

 the lower ramus with seven little spines on the iuner, and five on the outer side, the 

 apex being formed by a broad nail, which at its base is observably less broad than the 

 part of the blade from which it issues. 



Telson reaching beyond the peduncles of the third uropods, almost oblong but a 

 little narrowed distally, cleft three-fourths of its length, the cleft a little dehiscent, three 

 spinules on each lateral margin, and a fourth in the apex close to the lateral margin ; 

 beyond this the apex is slightly and squarely prolonged with a small cavity as if for a spine. 

 Length. — The specimen, in the position figured, measured half an inch from the fore- 

 head to the back of the third pleon-segment. 



Locality. — Station I70a, near the Kermadec Islands, July 14, 1874 ; lat. 29° 45' S., 

 long. 178° 11' W.; depth, 630 fathoms; bottom, volcanic mud; bottom temperature, 

 39°'5. One specimen, a female. Trawled. 



Remarks. — The specific name is given out of respect to my friend, A. M. Norman, 

 who is highly distinguished in so many branches of marine zoology, and by whom the 

 genus Exwnyx, to which I have referred this species, was originally instituted. 



