362 Dr. Cbas. Chilton on a new Species of ike 



Kedah : Kedah Peak, 3200 ft. {Dr. A. T. Stanton), 1 ? , 

 In spite of its obviously close relationship with 0. nebuloms, 

 de Meij., there are a number of small differences in venation 

 in which the new species bears a greater resemblance to 

 Cladura. The characters common to both species of Oxy- 

 discus, distinguishing them from Cladura, are the shortness 

 of Sc and the presence of surface-hairs towards the apex of 

 the wing. 



XLf. — A neio Species of the Ainphipodan Genus Hyale from 

 New Zealand. By Chas. Chilton, M.A., D.Sc, LL.D., 

 F.L.S., C.M.Z.S., Professor of Biology, Canterbury 

 College, New Zealand. 



The genus Hyale is represented in New Zealand by several 

 species, of which, perhaps, the commonest is H. rubra 

 (G. M. Thomson), which is found on all parts of the New 

 Zealand coast, and agrees well with the brief description 

 given by Stebbing in ' Das Tierreich, Amphipoda' (p. 572). 

 In November 1915 a number of specimens of Hyale were 

 sent to me by Mr. P. W. Grenfell from Cuvier Island. Most 

 of these proved to belong to Hyale rubra, but among them 

 there was one that attracted my attention by its peculiar 

 maxillipedes, the terminal joints of which were greatly ex- 

 panded and thickly covered with long setse. On examination 

 it proved that this specimen, which was a male, differed from 

 H. rubra in the second gnathopod also, and 1 am therefore 

 describing it as a new species. Unfortunately I have only 

 the single specimen, but the characters of the maxillipedes 

 and the second gnathopods are so distinctive that it will be 

 easy to recognize it again. It is quite likely that the peculiar 

 development of the maxillipedes is found in the male only, 

 and is to be looked upon as a secondary sexual character, but 

 the female of this species is at present unknown. The 

 following will serve as a description : — 



Hyale grenfellif sp. n. (Figs. 1-5.) 



Specific diagnosis. Male. — In general resembling H. rubra 

 (G. M. Thomson), but differing in the maxillipedes, which 

 have the carpus and propod greatly dilated and thickly 

 covered with long slender hairs, and in the second gnathopod, 

 in which the palm is only slightly oblique, well defined, 

 broad, the margin on both outer and inner sides being deeply 



