632 SUBANTARCTIC ISLANDS OF NEW ZEALAND. [Crustacea. 



t 



Fam. Dexaminidab. 

 Genus Paradexamine, Stebbing, 1899. 

 Distribution. — New Zealand, Australia, and Graham Land. 



Paradexamine pacifica (G. M. Thomson). 



Dexamine pacifica, G. M. Thomson, Trans. N.Z. Inst., xi, p. 238, pi. x6, 

 fig. 4. Paradexaynine pacifica, Hutton, Index Faunae N.Z., p. 259, 

 1904 ; Stebbing, " Das Tierreich Amphipoda," p. 518, 1900 ; Caiman, 

 Ann. & Mag. Nat. Hist., ser. 8, i, p. 233, 1908. 



A few specimens of this species were taken in Carnley Harbour, at a depth of 

 2 fathoms. They are identical with specimens from Port Chalmers, Lyttelton, 

 and other parts of New Zealand, where the species is quite common. It is also 

 known from the east coast of Australia. Monsieur Chevreux, in his report on the 

 Amphipoda of the French Antarctic Expedition, has described a species of this genus 

 from Booth Wandel Island, and also from Port Charcot, which appears to ap- 

 proach very nearly to our New Zealand species. According to Monsieur Chevreux, 

 however, his species differs in having a dorsal median carina on the last two segments 

 of the peraeon and on the first segment of the pleon ; also, in the greater length of 

 the lower antennae, and in having the propod of the last pair of peraeopoda only 

 about half as long as the carpus. In his specimens, too, the last uropods are longer, 

 and surpass the length of the telson. 



Fam. Talitridae. 

 Genus Orchestia, Leach, 1813-14. 

 Distribution. — On all shores throughout the world. 



Orchestia serrulata, Dana. 



Orchestia serrulata, Dana, P. Amer. Ac, ii, p. 204, 1852, and U.S. Expl. 

 Exped., xiii, ii, p. 870, pi. Iviii, figs. 7 a~b ( ,? ), m-o ( ? ?), 1853 and 

 1855. 0. serrulata (part), Stebbing, " Das Tierreich Amphipoda," 

 p. 535, 1906. 



I have numerous specimens of this species from several localities in the 

 Auckland Islands and in Campbell Island. It is also found in various parts of 

 New Zealand, particularly in the south. 



Some of the specimens from the islands attain a large size, the males reaching 

 as much as 40 mm. in length of body. These specimens undoubtedly belong to this 

 species as described by Stebbing. It appears to be well characterized by the ridges 

 or corrugations on the segments of the body (though these, of course, are best- marked 

 only in the older males), by the shape of the second gnathopod of the male, by the 

 character of the fifth peraeopod, and by the comparative absence of spines on the 

 body and appendages. 



Stebbing united 0. aucMandiae, Spence Bate, with this species. I have, however, 

 as explained below, specimens which certainly agree well with Spence Bate's species, 

 but have no sign of ridges or corrugations even in large males, and, as there appear 



