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this species (1906 a). The specimens investigated by me also varied with regard to the strength
of their sculpture; in a number of them the sculpture was rather strong, in others, on the contrary,
it was more or less weak; I never, however, found it quite so weak as is stated by G. S. Bh ADY.
but it does not seem to me impossible that specimens which 1 i ve at a very low temperature
might be more or less entirely destitude of sculpture (cf. C. borealis-maxima). The distinguishing
feature of the variation found by me was that it was continuons. Because of this it seemed to
me best not to retain the form laevis as a special variety, but in the list of synonyms given
above I have included it as a synonym of the type species.
Habitat: — Antarctic Ocean:
S. A. E., PI. station 64 b, lat. 48° 27’ S., long. 42° 36’ W. ; depth, 2500—0 m.; 23. VI.
1902; temperature at the surface, 7,9° C.: 325 mature specimens and 20 juvenes; proportion
between males and females about 3:5; R. M. S. 264 and 265. S. A. E., PI. station 65 b. at
the same locality; depth, 400—0 m.; 23. VI. 1902; temperature at 400 m., 3,95° C.: 2 mature
males and 9 mature females; R. M. S. 267. S. A. E., PI. station 66 b, at the same locality;
depth, 200—0 m.; 23. VI. 1902; temperature at 200 in., 5,25° C.: 8 mature males, 6 mature
females and 1 juvenis; R. M. S. 268. S. A. E., PI. station 67 b, at the same locality; depth
100—0 m.; 23. VI. 1902; temperature at 100 m., 8,3° C.: 14 mature males, 12 mature females
and 1 juvenis; R. M. S. 269. S A. E., PI. station 68 b, at the same locality; depth 50—0 m.;
23. VI. 1902; temperature at 50 m., 7,55° C.: 4 mature males and 1 mature female; R. M. S. 270.
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 mature female; R. M. S. 291. S. A. E., PI. station 347, lat. 49" 3’ S., long. 46° 54’ \V.;
at the surface; 25. VI. 1902; temperature, 4,5° C. : 6 juvenes. S. A. E., PI. station 70 b, lat.
49" 56’ S., long. 49° 56’ IV.; depth 2700—0 m.; 27. VI. 1902; temperature at 2700 m. and at the
surface, + 1,67° C. and 3,4" C. resp.: 2 mature females; R. M. S 272. At the same station; depth
500—0 m. : 1 mature female and 4 juvenes; R. M. S. 271. S. A. E., PI. station 357, lat.
51" 31’S., long. 54" 39’ IV.; at the surface; 1. VII. 1902; temperature, 5,0" C.: 1 mature female
and 2 juvenes; R. M. S. 293. S. A.E., PI. station 355, lat. 51" 34’ S., long. 53° 18’ W. ; at the
surface; 30. VI. 1902; temperature, 4,5" C.: 3 mature females and 5 juvenes; R. M. S. 292.
S. A. E., PI. station 302, lat. 52" 6’ S., long. 55" 32’ V.; depth 500—Om.; 12. IV. 1902; temperature
at 500 m. and at the surface, 3,78" C. and 6,28" C. resp.: 6 mature males, 3 mature females and
2 juvenes; R. M. S. 279. S. A. E., PI. station 301, at the same locality; depth 100—0 m.; 12. IV.
1902; temperature at 100 m., 5,78"C.: 10 mature males, 12 mature females and 9 juvenes; R.
M. S. 278. S. A. E., PI. station 300, at the same locality; depth 50—0 m.; 12. IV. 1902;
temperature at 50 m., 6,21° C.: 6 mature males, 4 mature females and 2 juvenes; R. Al. S. 276 and 277.
S. A. E., PI. station 298, at the same locality; at the surface; 12. IV. 1902: 1 mature male
and 14 mature females; R. M. S. 275. S. A. E., PI. station 60 b, lat. 52" 39’ S., long 37" 35’
V.; depth 500—Om.; 17. VI. 1902; temperature at 500 m. and at the surface, + 1,35" C.
and + 0,50" C. resp.: 1 mature female; R. Al. 8. 263. S. A. E.. PI. station 307, lat. 52° 55’ S.,
long. 53" 12’ IV.; at the surface; 14. IV. 1902; temperature, 6.1" G.: 1 mature male, 4 mature
females and 1 juvenis; R. AI. S. 280. S. A. E., PI. stations 59 b and 318, lat. 53" 0’ S., long.
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