AMPHIPODA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 233 



These specimens agree closely with the description and figures given by STEBBING in 

 his Challenger Report. 



The species is known from the warm waters of the Pacific and the Atlantic Oceans. 

 It is perhaps not distinct from Synopia ultramarina Dana, with which it is united by 

 DELLA VALLE. 



Genus HYALE H. Rathke, 1837. 



Hyale grimaldii Chevreux. 



Hyale grimaldii Chevreux, 1891, p. 257, figs. 1-5, and 1900, p. 10, pi. ii. fig. 2. 

 Stebbing, 1906, p. 567. 



St Vincent, Station 24 ; among seaweed on shore. 1st December 1902. One 



male and one female ; the male 3 mm. long. 



Although these specimens are too small for certain identification, I think they must 

 belong to this species. The gnathopoda of the male agree well with CHEVREUX'S descrip- 

 tion, having the flange on the side of the basal joint, as described, and the propod is of 

 the same shape, though the rounded lobe on the palm near the base of the finger is not 

 so well marked. The lower antennse are hardly so stout as shown in CHEVREUX'S figure. 

 The species was previously known from the North Atlantic. 



Genus ALLORCHESTES Dana, 1849. 



Allorchestes plumicornis (Heller). 



Nieea plumicornis Heller, 1866, p. 5, pi. i. figs. 8 and 9. 

 Allorchestes plumicornis Stebbing, 1906, p. 583. 



Walker, 1901, p. 299, pi. xxvii. figs. 20 and 21. 



,, Chevreux, 1911, p. 241, pi. xvii. figs. 1-3. 



St Vincent, Station 24 ; north-east beach. 1st December 1902. Four small 

 specimens. 



There is no fully developed male among these specimens, but from the characters of 

 the females I think they must belong to this species. The largest is probably immature, 

 as the upper antennae have only eleven joints in the flagellum and the lower fourteen; 

 about half the joints in the latter bear tufts of long sensory setss, the tufts decreasing in 

 size distally ; there is also a tuft on the distal end of the last joint of the peduncle, but 

 none on the other parts of the peduncle. The second gnathopod agrees well with 

 WALKER'S figure ; the dactyl of all the perteopoda bears the prominent setule on the inner 

 margin, and in the remaining characters the specimens agree well with the descriptions 

 given by STEBBING and CHEVREUX. 



The species is well known from various parts of the Mediterranean, but does not 

 appear to have been recorded from St Vincent. 



(BOY. soc. EDIN. TRANS., VOL. XLVIII., 515.) 



