REPORT ON THE COPEPODA. 77 



character of the same member in the male, preclude the possibility of referring both 

 forms to the same genus. I therefore propose the name Drepanopus, which first 

 suggested itself as being applicable to the fifth pair of feet of the female pectinatus. 



1. Drepanopus pectinatus, n. sp. (PI. XXIV. figs. 1-11). 



Length, l-9th of an inch (27 mm.). Forehead rounded, rostrum short and slender ; 

 anterior antennae twenty-three-jointed in the male, twenty-four-jointed in the female, 

 as long as the cephalothorax, beset with short setae, the proximal half in the male (fig. 3) 

 bearing numerous stout club-shaped sensory appendages, the first and eighth joints in 

 both sexes much longer than the rest. The inner branches of the second, third, and 

 fourth feet have the first joint very small (figs. 8, 9), the marginal spines are sharp and 

 slender, and the terminal spines are long, bayonet-shaped, and closely serrated. The 

 fifth pair of feet in the female (fig. 10) are simple, three-jointed, the first two joints 

 short and tumid, the third joint slightly swollen at the base and produced into a long 

 curved extremity, the distal half of which is pectinated on its outer margin. In the male 

 (fig. 11) the fifth pair is prehensile, the right hmb terminating in a long falcate claw ; 

 the left limb is much shorter, and the inner branches of both sides are almost obsolete, 

 consisting only of a single minute joint. 



Habitat. — Drepanopus pectinatus occurred very abundantly in three surface-net 

 gatherings ; the first, indeed, consisted entirely of this species, and was taken (approxi- 

 mately) in lat. 47° S., long. 61° E. ; the second and third were from Betsy Cove, 

 Kerguelen Island, and from the open sea off the same place, so that the species, so far as 

 our present knowledge goes, is confined to very narrow limits. Only one male was 

 found, after looking over a very large number of specimens. 



2. Drepanopus furcatus, n. sp. (PI. IV. figs. 1, 2, and PL XXIV. figs. 12-15). 



Length, 1-1 8th of an inch (1'4 mm.). Anterior antennae as long as the cephalo- 

 thorax, very similar to those of Drepanopus pectinatus, but the eighth joint is not 

 larger than the rest, and the whole limb is less profusely setose. Mouth-organs and 

 swimming feet also like those of Drepanopus pectinatus, except that the inner branch of 

 the second foot (fig 12) is one-jointed, and the terminal spines (fig. 14) are shorter, 

 stouter, and more finely serrated. The fifth pair in the female (fig. 15) is short and two- 

 jointed, the last joint forked at the apex. Male unknown. 



Habitat.— This species, like the last, was found in three gatherings, but only sparingly. 

 The three localities belong to totally distinct areas, and are as follows: — off Cape lb. we. 

 Australia, at night; in the tow-net, at a depth of 20 fathoms, in lat, 33° 31' S. ; long. - 4 



