AMPHIPODA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 205 



Genus PARIPHIMEDIA Chevreux, 1906. 



Pariphimedia integricauda Chevreux. 



Pariphimedia integricauda Chevreux, 1906A, p. 39, fig. 25, and 1906B, p. 39, figs. 21-23. 



South Orkneys, Scotia Bay, Station 325; shore pools. 4th February 1904. 



Temperature 32-35. One specimen, 13 mm. long. 

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



clumps of weed. 3rd December 1903. Temperature 29'l. One specimen, 



1 1 mm. long. 



These specimens agree well with M. CHEVREUX'S description and figures so far as 

 the external characters are concerned. I have not examined the mouth parts in detail. 

 His specimens were obtained at Wandel Island. 



Genus ACANTHONOTOZOMA Boeck, 1876. 

 Acanthonotozoma austmlis, sp. nov. (PI. II. fig. 19.) 



Scotia, 18th March 1904. Lat. 71 22' S., long. 16 34' W. ; 1410 fathoms. 

 Station 417. One female specimen ; length of body (head to base of telson), 

 35 mm. 



Head and anterior six segments of perseon dorsally rounded ; last segment of perseon, 

 the three segments of pleon, and first of urus dorsally carinate. On the first four of 

 these the carina forms a large tooth produced acutely backwards ; on the first segment 

 of the urus it is confined to the posterior half of the segment, and is preceded by a 

 slight notch, the whole of the portion in front of which is folded under the preceding 

 segment when the body is fully extended. The carina itself is convex anteriorly, and 

 produced backwards into a very acute point (fig. 19). 



Head broad, dorsally convex, curving slightly downwards in front, and ending in a 

 short acute rostrum reaching about half way to end of first segment of upper antenna ; 

 lateral margin with a short subacute process below the upper antenna, and with the 

 lower margin produced anteriorly into a rounded process and separated from the rest 

 of the head by a slight furrow. 



First side plate produced anteriorly, with anterior angle rounded and posterior angle 

 quadrate ; second, anterior angle rounded, posterior subacute ; third, much deeper than 

 first and second, posterior angle produced, almost acute ; fourth, posterior angle pro- 

 duced acutely inferiorly, the posterior process between the two emarginations subacute ; 

 fifth, anterior lobe regularly round, posterior lobe a little deeper, acute, and with a 

 groove below for basal joint of peraeopod ; sixth, similar, but with anterior lobe smaller 

 and concealed by the fifth side plate ; seventh, small and rounded. Lower border of 

 first pleon segment rounded below, the second with lower margin straight and posterior 

 angle produced acutely ; both with an oblique ridge running towards the posterior angle. 

 Third segment similar to the second segment, but without ridge. 



(ROY. SOC. EDIN. TRANS., VOL. XLVJII., 487.) 



