228 PROFESSOR CHARLES CHILTON ON THE 



I have been forced to make a new species for these specimens from South Africa, 

 from which locality no species of Hyale appears to have been hitherto recorded. The 

 species appears to come very close to H. camptonyx (Heller), from the Mediterranean 

 and North Atlantic, but it differs in a few points mentioned in the description above, and 

 particularly in the peculiar and apparently characteristic expansion of the first joint of 

 the peduncle of the upper antenna. H. schmidtii (Heller), also from the North Atlantic, 

 seems to be pretty closely allied also, but has the second antenna much longer. 



In many respects the present species is similar to H. media (Dana), which is known 

 from several localities on the borders of the Atlantic Ocean, but it seems to be clearly 

 distinguished from that species by the absence of the " very large submedian serrate 

 spine " on the propod of perseopoda 3 to 5. 



Genus HAPLOCHEIRA Haswell, 1879. 

 Haplocheira barbimana (G. M. Thomson). 



Gammarus barbimanus G. M. Thomson, 1879, p. 241, pi. X.D, fig. 1. 

 Haplocheira barbimana Stebbing, 1906, p. 609. 

 Walker, 1907, p. 35. 



South Orkneys, Scotia Bay, Station 325 ; 9-10 fathoms. May 1903. Five 

 specimens. 



The largest of these specimens is 7 mm. long. They agree closely with New 

 Zealand specimens. 



The species is widely distributed in southern seas. 



Genus EUBYSTHEDS. 

 (?) Eurystheus afer (Stebbing). (PI. II. figs. 30-34.) 



Gammaropsis afro, Stebbing, 1888, p. 1097, pi. cxiii. 

 Eurystheus afer Stebbing, 1906, p. 612. 

 1910B, p. 461. 



Gough Island, Station 461 ; trawl, 100 fathoms. 23rd April 1904. Two small 

 specimens : the one a male, 4 mm., probably immature ; the other a female, 

 5 mm. 



I refer these specimens to this species with considerable doubt ; but if, as Mr 

 STEBBING suggests, E. atlanticus is only a variety of this species, it appears to be a 

 variable one, and it may perhaps be extended sufficiently to include forms now being 

 considered. The male specimen probably has not acquired the fully adult characters. 



The female specimen differs from STEBBING'S description in having the eyes oval 

 and of normal shape ; the first gnathopod (fig. 30) has the carpus longer than the 

 propod, and the whole limb is more slender ; the second gnathopod (fig. 3 1 ) is also 

 longer, the carpus is not cup-shaped but sub-triangular, widening distally, and is about 



(ROY. soc. EDIN. TRANS., VOL. XLVIII., 510.) 



