studies on marine Ostracods 687 



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. Bhadv, 

 but it does not seem to me impossible that specimens which live at a very low temperature 

 might be more or less entirely destitude of sculpture (cf. C. horealis-maxima). The distinguishing 

 feature of the variation found by me was that it was continuous. 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 (J (■ e a n : 



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" CJ. : 325 mature specimens and 20 juvenes; proportion 

 between males and females about 3 : 5; R. M. S. 264 and 265. S. A. I"... 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. YI. 1902; temperature at 200 m., 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 locahty; depth 

 100—0 m.; 23. VI. 1902; temperature at 100 ni., 8,3" C: 14 mature males, 12 mature females 

 and 1 juvenis; R. M. S. 269. S A. K., 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' \V.; 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' W.; 

 at the surface; 25. "VT!. 1902; temperature, 4,5" C. : 6 juvenes. S. A. E., PI. station 70 b, lat. 

 49" 56' S., long. 49" 56' \\.; depth 2700—0 m.; 27. \'I. 1902; temperature at 2700 m. and at the 

 surface, + 1,67" C. and 3,4" C. resp. : 2 matui'e females; R. M. B, 272. At the same station; depth 

 500 — m. : 1 mature female and 4 juvenes; R. M. S. 271. 8. A. li., PI. station 357, lat. 

 51"3rS., long. 54" 39' W.; 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. 50° 32' W. ; depth 500—0 m. ; 12. 1 \ . 19(i2; 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— (» m.; 12. IV. 1902; tempera- 

 ture at 50 m., 6,21" C. : 6 mature males, 4 mature females and 2 juvenes; R. M. B. 276 and 277. 

 S. A. E., Pi. station 298, at the same locality; at the surface; 12. I\'. 19(i2: 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— m. ; 17. VI. 1902; temperature at .500 m. and at the .surface, + 1,35" C. 

 and + 0,50" C. resp.: 1 matuie female; R. M. S. 263. S. A. E., PI. station 307. lat. 52" 55' S., 

 long. 53" 12' W.; at the surface; 14. IV. 1902; temperature, 6,1" (-'.: 1 mature male, 4 mature 

 females and 1 juvenis; R. M. S. 280. S. A. E., PI. stations 59 b and 318, lat. 53" 0' S., long. 



