626 SUBANTARCTIC ISLANDS OF NEW ZEALAND, [Crustacea. 



on the first antenna is smaller and less distinct than in typical specimens, and is 

 apparently fused with the last joint of the peduncle, showing only as a slight pro- 

 jection from it. (3.) The carpus of both gnathopods is shorter and more triangular 

 than in typical specimens from the Auckland or Campbell Islands. (4.) The branches 

 of the third uropods are slightly longer and broader, and are more abundantly sup- 

 plied with setae and long fine hairs, and thus resemble more nearly the uropods of 

 species of Pontogeneia. 



In the specimens from New Zealand, Auckland Island, Campbell Island, and 

 Macquarie Island there is no rostrum, nor is there one present in the Tasmanian 

 specimen that I have examined ; in all of these, too, the appendage on the first 

 antenna is comparatively distinct and well marked. 



My specimens agree, on the whole, with the specific description given by Mr. 

 Stebbing in " Das Tierreich Amphipoda," but there is at least one point in the generic 

 description which does not always hold — viz., " Uropods 1 and 2, outer ramus the 

 shorter." This is true for the second uropod ; but in the first uropod the outer ramus 

 is hardly, if at all, shorter than the inner one. It appears that in this family of the 

 amphipods particularly there has been an unnecessary multiplication of genera, 

 and consequently some characters have been introduced into the generic description 

 which are subject to individual variation. 



Mr. Walker has recorded a variety of this species from Port Ross, Auckland 

 Island, but the points he mentions seem hardly sufficient to establish a new variety, 

 especially as he was able to examine only a single female specimen. 



I think there can be no doubt that Stebhingia gregaria, Pfeffer, from South 

 Georgia, was based on specimens of Paramoera austrina in which the accessory ap- 

 pendage was really absent or was not observed. In 1888 Stebbing was inclined to 

 unite the two, but in 1906 he still keeps them distinct, and recognises Stebhingia as 

 a separate genus. The specimens from Kerguelen Island described by S. I. Smith 

 in 1876 under the name "'Atylus (?) australis, Miers (?)," are also shown by Smith's 

 description to belong to this widely distributed and variable species. 



On a single "female with ova, length 10 mm.," from Enderby Island, Mr. 

 Walker* has founded a new genus, AucMandia, for which he gives the following 

 diagnosis : " Antenna 1 shorter than antenna 2, with short accessory flagellum. 

 Gnathopods dissimilar. Otherwise as Paramoera^ 



In his diagnoses of Paramoera, however, Stebbing says, "Antenna 1 not longer 

 than antenna 2," and, as a matter of fact, in P. austrina it is occasionally somewhat 

 shorter, so that this point is not of sufficient importance to rank as a generic character. 

 As to the next point — " gnathopods dissimilar " — this is also the case to a slight 

 extent in Paramoera, though not expressly so stated in Stebbing' s diagnosis. Seeing 

 that these are the only two points on which Mr. Walker establishes his genus, and that 

 he says " Otherwise as Paramoera,'" I cannot help thinking that his specimen is 

 only one of Paramoera austrina in which the gnathopods are slightly more dissimilar 

 than usual and the palm rather more transverse than is generally the case. The 

 whole of his description applies almost exactly to Paramoera austrina, except perhaps 

 with regard to the gnathopoda, and these are not altogether inconsistent with the 

 supposition expressed above. 



* Ann. and Mag. Nat. Hist., ser. 8, ii, p. 35, pi. v, figs. 3, 4, 1908. 



