1140 THE VOYAGE OF H.M.S. CHALLENGER. 



at four points in front and a small group at the apex behind ; the finger more than half 

 the length of the fifth joint, curved, acute, with a very small dorsal cilium. 



Fourth Perseopods longer than the third, similar, except that the front margin of the 

 first joint is straighter, and the hind margin rather sinuous, the joint being a good deal 

 narrower below than above. 



Fifth Perseopods like the fourth, but longer, and with the fifth joint longer than the 

 third. 



Pleopods. — Coupling spines very thin, bent, with two or three small lateral hooks ; 

 the cleft spines not well made out, apparently three or four in a series ; joints of the rami 

 about ten in number. 



Uropods. — Peduncles of the first pair longer than the rami, with five spines on one 

 of the upper margins and six on the other, and the usual large spine on the lower apex ; 

 the outer ramus shorter than the inner, with five spines on one margin, one on the 

 other, and a small apical group ; the inner ramus with one margin free, otherwise 

 armed like the outer ; the peduncles of the second pair a little longer than the inner 

 ramus, the apical spine short ; the shorter outer ramus has four spines on each margin 

 and an apical group ; the inner ramus has seven on one margin, two on the other, and 

 an apical group ; the peduncles of the third pair longer than the rami, reaching beyond 

 the other peduncles and the telson, with five or six groups of spines along the inner 

 margin, and six small spines about the distal margin in two groups ; the rami are short 

 and narrow, subequal, with the acute apices a little bent, especially that of the slightly 

 shorter outer ramus, this apex being a little pectinate ; the inner ramus has a marginal 

 spine. 



The Telson in outline forms a pointed arch reversed, about as long as the greatest 

 breadth ; below it appears to have a carina, narrow near the apex, but towards the base 

 spreading out into a triangular surface. 



Length. — The male specimen from which fig. gn.2. $ . was drawn, measured just 

 over a fifth of an inch, in a straight line from the front of the head to the extremity 

 of the uropods. 



Locality. — Station 168, off New Zealand, July 8, 1874 ; lat. 40° 28' S.; long. 177° 43' 

 E.; depth, 1100 fathoms; bottom, blue mud; bottom temperature 37°'2. Two 

 specimens, male and female. 



Remarks. — All the figures except gn.2. were drawn from the female specimen. 



The specific name is given in compliment to Dr. P. P. C. Hoek, who in 1882 gave a 

 brief description and some figures of a new species, Podocerus tuberculatus, among the 

 Crustacea of the " Willem Barents " Expedition. This species was obtained in lat. 71° 23' 

 N., long. 49° 38' E., and judging only from the preliminary description and the figures 

 of the two gnathopods, third uropods, and telson, presents an extraordinary resemblance 



