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Seen from below both tbe males and the female sbells differ from tbose of tbe type species by
having the posterior part somewhat less developed; in most cases this was not, even in the
females, perceptibly ] arger than the anterior part.
Other organ-. With regard to the mandible, maxilla, fifth, sixth and seventh limbs, ftxrca, upper lip
and paragnates the Scandinavian and the Antarctic forms of this species agree with each other.
The e-bristle on the female first antenna has proximally on the anterior side similar hairs to
those of the type species.
Habitat: — Antarctic Ocean:
S. A E., PL station 64 b, lat. 48° 27’ S., long. 42° 36’ W. ; depth 2500 ru—0 m. ; 23. VL
1902; temperature at the surface 7,90° C.: 26 mature males, 65 mature females and 5 juvenes;
R. 31. S. 223 and 224. S. A E., PI. station 65 b, at the same locality; depth 400—0 m. ;
23. VI. 1902; temperature at 400 ru -j- 3,95° C. : 2 mature males, 4 mature females and 1 juvenis;
R. M. S. 225. S. A E., PI. station 66 b, at the same locality; depth 200—0 m.; 23. VI. 1902;
temperature at 200 nu, 5,25° C.: 1 mature female and 2 juvenes; R. M. S. 226. S. A. E.,
PI. station 345, lat. 48° 32’ S., long 44° 28’ W.; at the surface; 24. VI. 1902; temperature
7,9° C.: 1 juvenis; R. 3L S. 233. S. A. E., PI. station 347, lat. 49“ 3’ S., long. 46° 54’ \V.;
at the surface; 25. VI. 1902; temperature, 4,5° C.: 2 juvenes; R. 31. S. 234. S. A. E., PI.
station 70 b, lat. 49° 56’ S., long. 49° 56’ W. ; depth, 2700—0 m.; 27. VI. 1902; temperature at
2700 ru and at the surface, — 1,67° C. and 3.40° C. resp. : 5 mature females and 1 juvenis;
R. 31. S. 228. At the same station; depth 500—0 ru: 2 mature females; R. 31. S. 227. S. A.
E.. PI. station 302. lat. 52° 6’S., long. 55° 32’ W. ; depth, 500—0 m. ; 12. IV. 1902; temperature
at 500 ru and at the surface, 3,78° C. and 6,28° C. resp.: 2 mature males; R. 31. S. 229. S. A.
E., PI. station 316, lat. 53°0’ S., long. 48° 27’ W.; depth, 100—0 ru; 17. IV. 1902; temperature
at 100 ru and at the surface, 3,0° C. and 3,40° C. resp.: 1 mature female; R. 31. S. 231.
•S. A. E., PI. station 317, at the same locality; depth 250—0 m.; 17. IV. 1902; temperature
at 250 ru. — 1,30° C.: 1 mature female; R. 31. S. 232. S. A. E., PL station 312, lat. 53° 1’ tS.,
long. 51°53’ W.; depth 200—0 ru; 15. IV. 1902; temperature at 200 m. and at the surface,
3,50e C. and 5,48° C.: 1 mature male, 3 mature females and 2 juvenes; R. 31. S. 230.
Distribution: — The Antarctic Ocean between lat. 26° S. and lat. 43° S. All the localities
referred to above are thus south of the previously known area of distribution.
Rotundata group G. W. Muller.
This group comprises five species (one of which is divided into two sub-species) besides
the two dealt with below. As has already been pointed out by G. \V. 31 OLE ER, it can be distinetly
Oefined from other groups belonging to this genus. It is characterized especially by the position
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