Crustacea.] SUBANTARCTIC ISLANDS OF NEW ZEALAND. 621 



the flagellum is very slender, with only a few fine setae, and is about the same width 

 throughout nearly the whole of its length. In the same way the fifth peraeopod 

 becomes greatly elongated in older specimens, so that it may reach far beyond 

 the posterior end of the animal. It appears to be a fully developed specimen of 

 this kind that is figured by Dana, and his figure represents pretty accurately the 

 general appearance of such specimens, although it does not show the projection of 

 the head characteristic of this family. The gnathopods (figs. '2a and 26) and other 

 appendages agree very closely with the description given by Stebbing, though in 

 the older specimens the second gnathopod may have the propod more elongated 

 than is shown in his figure. 



AVhen examined alive the animal is seen to be almost transparent, with a few 

 slight silvery marks on the back ; the eyes are pale pinkish in colour, and appear 

 to be quite coalesced and to occupy the whole front part of the head. 



Mr. Stebbing has suggested that Paracalliope jiuviatilis (G. M. Thomson) is not 

 improbably identical with Oediceros novi-zealandiae, Dana ; at that time, however, 

 Dana's species had not been rediscovered in New Zealand, and it is evident from 

 what has been already said that the two species are quite d'stinct. 



Fam. Calliopiidae. 



Genus Leptamphopus, Sars, 1893. 



Distribution. — Only two species of the genus known — one from arctic and sub- 

 arctic seas, the other from antarctic and subantarctic seas. 



Leptamphopus novae-zealandiae (G. M. Thomson). 



Pherusa novae-zealajidiae, G. M. Thomson, Trans. N.Z, Inst., xi, p. 239, 

 pi. xc, figs. 2, 2 a-c, 1879. Panoploea dehilis, G. M. Thomson, Ann, & 

 Mag. Nat. Hist., ser. 5, vi, p. 3, pi. i, fig. 3, 1880. Leptamphopus 

 novae-zealandiae, Stebbing, " Das Tierreich Amphipoda," pp. 294, 727, 

 1906. Oradarea longimana, A. 0. Walker, Journ. Linn. Soc, xxix, 

 pp. 40, 56, pi. x, figs. 77-89, 1903 ; Nat. Antarct. Exped., Amphipoda, 

 p. 32, 1907 ; Stebbing, " Das Tierreich Amphipoda," p. 727, 1906 ; 

 Chevreux, Exped. antarct. frangaise, Amphipoda, p. 54, 1906. 



A single specimen of this species was taken in Carnley Harbour along with 

 Atyloides serraticauda and A. magellanica (Professor W. B. Benham). 



On the whole, this specimen agrees well with Walker's description, but it has 

 only the last segment of the peraeon and the first and second of the pleon dorsally 

 produced. In the first antenna the second joint is produced distally, so as to form 

 a subacute lobe or tooth on each side, as described by Mr. Walker. These lobes 

 allow the third joint to move upon the second in a vertical direction but not laterally, 

 and they thus act as a support to the third joint, guiding and strengthening its 

 movements. 



There can be no doubt that Mr. Stebbing was right in pointing out the 

 resemblance between Oradarea longimana, Walker, and Leptamphopus novae-zea- 

 landiae (G. M. Thomson). My specimen from the Auckland Islands is certainly 

 the same as the New Zealand species, and I cannot find any reason for considering 

 it specifically different from Mr. Walker's species. In his later work Mr. Walker has 



