REPORT ON THE AMPHIPODA. 1413 



Fifth Pcr&opods similar to the fourth, the first joint perhaps a little longer, with 

 some spines on the lower part of the inner hind margin ; the third joint narrower, with 

 some spines on its inner surface ; the fourth joint shorter and narrower than in the 

 preceding pair ; the fifth joint slightly shorter than in the preceding pair, with the 

 hind margin smooth, and the front having a very faint pectination, which, instead of 

 becoming stronger towards the apex, is entirely absent from the lower part of the joint. 



Pleopods. — The cleft spine placed at the middle of the long first joint, with the 

 serrate arm a little longer than that which bears the narrow subapical dilatation ; the 

 first joint of the outer ramus having a tongue-like interlocking process, and carrying 

 three or four setse on a bulge of the outer margin near the centre ; the joints of the 

 inner ramus numbering from thirteen to fourteen, of the outer from fourteen to fifteen. 



Uropods. — Peduncles of the first pair longer than the rami, which are rather long 

 and narrow, the outer shorter and narrower than the inner ; the adjacent margins of the 

 two rami in all three pairs finely pectinate ; the peduncles of the second pair rather 

 shorter but broader than those of the first, the inner apex acute ; the outer ramus 

 shorter and much narrower than the inner, shorter than the outer ramus of the first 

 pair, the inner ramus a little shorter than the peduncle, with which it appears to be 

 almost coalesced, a little shorter but broader than the inner ramus of the first pair ; 

 peduncles of the third pair the broadest and longest, the rami respectively broader than 

 those of the first pair, and nearly as long. 



Telson small, triangular, the breadth at the base equalling the length. 



Length of the two largest specimens, three-fifths of an inch. 



Localities. — January 23, 1874 ; off the north-east coast of Kerguelen Island; surface ; 

 surface temperature, 40 o, 5. A large number of specimens, most of them not full grown. 



Station 302, December 28, 1875 ; off Patagonia ; lat. 42° 43' S., long. 82° 11' W.; 

 surface ; surface temperature, 55°. Six specimens, not adult. 



Station 314, January 21, 1876, Cape Virgins to Falkland Islands ; lat. 51° 35' S., 

 long. 65° 39' W.; surface; surface temperature, 48°. Numerous specimens, not adult. 



Remarks. — In the first instance I regarded the Kerguelen specimens, one of which 

 is figured on PI. CLXXIL, as distinct from the South American, one of which from 

 Station 302 is figured on PL CLXXIII.; but the differences appear to depend upon the age 

 of the specimens, in the young ones the process of the wrist of the second gnathopods 

 being less outdrawn than in the adults, and similarly the fourth joint in the first and 

 second perseopods being much less widened, the fifth joint of the third perseopods less 

 elongate, and the back of the animal less compressed. The type-specimen described and 

 figured by Guerin was taken by M. Gaudichaud at the Falkland Isles. Bovallius, Arctic 

 and Antarctic Hyperids, p. 568, says of this species, that "it is characterized by the carpal 

 process of the second pair of pereiopoda [Second Gnathopods] being provided with long 



