742 THE VOYAGE OF H.M.S. CHALLENGER. 



the corresponding part of the preceding pair, but with the third joint still more decurrent, 

 and the fourth and fifth joints rather longer. 



Fifth Perseopods. — Side-plates similar to the preceding pair, but smaller. Branchial 

 vesicles small. First joint greatly expanded, longer than broad, its length surpassing 

 that of the next four joints united ; the front margin nearly straight, carrying a few 

 small spines, the hind margin serrate, very convex, the lower margin rounded, partially 

 overlapping the short second joint, which has spines at two points of the front margin ; 

 the third joint has spines at two or three points in front, and at four points of the hind 

 margin, which is decurrent almost to the apex of the fourth joint ; the fourth joint has 

 spines at four points of the front margin, the apex of which is acute ; the fifth joint, 

 which is longer than the fourth, but shorter than the third, has a single spine near the 

 centre of the pectinate front margin ; the finger is more than half the length of the fifth 

 joint, its inner margin pectinate. 



Pleopods. — The coupling Spines are very slender, with three or four minute teeth on 

 either side close to the apex ; near them is a plumose seta ; from a process at the top of 

 the peduncle another plumose seta projects ; the first joint of the inner ramus has two 

 cleft spines, in which the branches are nearly equal, the outer, as usual, serrate on its 

 inner margin ; the inner ramus has seven, the outer eight joints. 



Uropods. — As in the two preceding species, the peduncles appear* to be carinate and 

 channelled ; the first pair both as regards the peduncles and the rami reaching a very 

 little beyond the second, and the second beyond the third ; the first and second pairs, 

 but not the third, have some spines on the edges of the peduncles ; all the rami have 

 pectinate edges ; in the first pair the longer outer ramus has two spines on the upper part 

 of the outer margin, in the second pair there is but one spine ; in the third pair the rami 

 are nearly equal in length to the peduncles, the outer ramus being a little longer than 

 the inner, its distal portion consisting of a nail which is more than a third of the total 

 length. 



Telson about as broad as long, very small, not nearly reaching the end of the 

 peduncles of the third uropods, its curved sides converging to an acute apex, which is 

 cleft for about a third of the length of the telson, not dehiscent. 



Length. — The specimen, in the position figured, measured, from the front of the head 

 to the back of the second segment of the pleon, one-fifth of an inch. 



Locality.— ^tsAion 168, ofi" New Zealand, July 8, 1874 ; lat. 40° 28' S., long. 

 177° 43' E.; dej)th, 1100 fathoms; bottom, blue mud; bottom temperature, 37°'2. One 

 specimen ; female. Trawled. 



Remark. — The specific name refers to the great depth from which this little creature 

 was obtained, but is principally designed to call attention to its close relationship with 

 the northern species, Andania ahyssi, Boeck. 



