38 On Amphipoda from the Auckland Islands. 



its base, the front and hind margins subparallel, the latter 

 with a spinous tubercle ; hand subtriangular, palm very 

 oblique, straight, setose and spinous, and defined by two 

 stout spines ; hind margin about one-fourth as long as the 

 palm, with which it forms a rounded and setose angle. 

 Dactylus very stout, about two-thirds as long as the palm. 



Gnathopod2: side-plate suborbicular. Second joint longer 

 than third and fourth united ; wrist very small, not produced 

 behind ; hand obpyriform, the width near the base nearly 

 three-fourths of the length ; palm undefined ; hind margin 

 almost straight, but swollen and rounded at the base, densely 

 setose. Dactylus about half as long as the hind margin. 



Female (with ova). — Antenna 1 reaching the end of the 

 fourth joint of the flagellum of ant. 2 ; flagellum 12-jointed. 



Gnathopod 1 : side-plate rounded below, with a prominent 

 tooth on the upper part of the hind margin. Second joint 

 stout, rather longer than the next two; wrist le3S than half 

 as large as the hand, the hind margin slightly produced ; 

 hand subovoid, front margin very convex, about twice as long 

 as the hind ; palm oblique, shorter than the hind margin. 

 Dactylus as long as the palm. 



Gnathopod 2 : side-plate and whole limb like gnathopod 1, 

 but rather larger. 



Perajopod 2 : second joint narrow, fourth twice as wide as 

 the fifth. Branchial vesicle wide-ovate. 



Peraeopod 5 : second joint as wide as long, fourth and fifth 

 joints widening difctally and terminated by a fringe of spines. 



Uropod 3 : ramus subequal to peduncle, 3 or 1 distal spines 

 on each. 



Tel.^on divided to the base ; divisions quadrate, with 

 rounded angles. 



Length of male 20 mm. ; female 12 mm. 



The form of gnathopod 1 in the male is the most salient 

 character. 



Genus Alloechestes, Dana. 

 Allorchestes novizealandia?, Dana. 



Enderby I., 19/3/04. Two males ; length 12 mm. 



It is difficult to see why Prof. Delia Valle (and, doubtless 

 following him, .Mr. G. M. Thompson*) should have referred 

 this species to Hyah prevostii, M.-Edw. The structure of 

 the wrist in gnathopod 2, <$ , proves it to be an Allorchestes. 



* Trans. N. Z. Inst. 1898, vol. xxxi. pp. 197-207. 



