AMPHIPODA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 487 
Genus ParIpHIMEDIA Chevreux, 1906. 
Pariphimedia integricauda Chevreux. 
Pariphimedia integricauda. Chevreux, 1906a, p. 39, fig. 25, and 1906s, 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. 38rd December 1903. Temperature 29°:1. One specimen, 
11 mm. long. 
These specimens agree well with M. Coevrevx’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 AcaNTHONOTOzZOMA Boeck, 1876. 
Acanthonotozoma australis, sp. nov. (Pl. IL. 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 pereeon dorsally rounded ; last segment of person, 
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 seement 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 pereeopod ; 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. 
TRANS, ROY. SOC, EDIN., VOL, XLVIII. PART IT, (NO. 23). 73 
