AMPHIPODA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 185 



Genus CHEIRIMEDON Stebbing, 1888. 



Cheirimedon femoratus (Pfeffer) . 



Anonijx femoratus Pfeffer, 1888, p. 93, pi. ii. fig. 2. 



Cheirimedon dentimanus Chevreux, 1905, p. 159, and 1906B, p. 2, figs. 1-4. 



South Orkneys, Brown's Bay, Station 326A. November 1903. Many specimens 



of about 10 mm. in length. 

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



One small specimen. 

 South Orkneys, Scotia Bay, Station 325 ; dredge, 4 fathoms, gravel bottom, 



clumps of weeds ; temperature 29'l. 3rd December 1903. Two specimens. 



These specimens agree minutely with the figures and description given by CHEVREUX, 

 and I have been able to compare them with co-types of his species which he has been 

 good enough to send me. I have also compared them with a specimen of Anonyx 

 femoratus Pfeffer from South Georgia, kindly placed at my disposal by the authorities 

 of the Hamburg Museum, and I find it is quite the same as the South Orkneys 

 specimens and those from Port Charcot sent to me by Monsieur E. CHEVREUX. Pfeffer's 

 description agrees well with C. dentimanus, but his figure shows the telson too broadly 

 rounded posteriorly and the cleft too shallow. The figure was, however, made without 

 dissecting the specimen. His name has priority by many years. M. CHEVREUX states 

 that this species appears to closely resemble C.fougneri Walker from South Victoria 

 Land. I have been able to examine co-types of this species from the British Museum, and 

 also specimens obtained by the Nimrod Expedition, and find that, though there is consider- 

 able resemblance in general structure, C.fougneri differs considerably from C. dentimanus 

 in the greater length of the antennae, and also in having the body much less compact, 

 and the first gnathopod more slender. 



Genus TRYPHOSA Boeck, 1871. 



Tryphosa murrayi Walker. 



Tryphosa murrayi Walker 1903A, p. 50, pi. ix. figs. 45-51. 

 ,, 1907, p. 16 (part). 



Station 411, Coats Land, lat. 74 l' S., long. 22 W. ; 161 fathoms. Many 

 specimens, the largest 22 mm. long. 



After much consideration, I have decided to record these specimens under the name 

 given above. I have been able to compare them with the type of Mr WALKER'S species 

 obtained by the Southern Cross Expedition, and the two agree so closely that they 

 must be considered specifically identical. The eyes are obsolete, the lateral lobes of the 

 head produced and acute or subacute, the hind margin of the third pleon segment straight, 



(ROY. soc. EDIN. TRANS., VOL. XLVIII., 467.) 



