studies on marine Oslracods 'j47 



were, as will be seen below, 14 males and 29 females. In another sample 125 individuals were 

 investigated, of which 39 were males and 86 females. In some cases the proportion was one 

 to four or even one to five or males were quite absent. The females predominated in number 

 in the larvae as well. 



Habitat: — Skager Rak and Cattegat: 



North Koster; 2. II.: Depth, Om. : 1 mature male, 5 mature females and 1 juvenis; R. M. 

 S. 345. Depth, 30 m. : 2 mature males and 6 mature females; R. M. S. 346. Depth, 65 m. : 

 8 mature females and 1 juvenis; R. M. S. 347. South Koster; 1. II.: Depth, m. : 2 mature 

 males and 2 mature females; R. M. S. 348. Depth, 30 m. : 14 mature males, 29 mature 

 females and 3 larvae; R. M. S. 349. Depth, 65 m. : 13 mature females and 2 juvenes; R. M. S. 

 350. Depth, 125 m. : 1 matui'e female; R. M. S. 351. Depth, 140 m. : 7 mature males, 6 mature 

 females and 4 juvenes; R. M. S. 352. Vaderoarna (oii Fjallbacka); 6. II.: depth, 65 m.: 

 1 mature male and 3 juvenes; R. M. S. 353 and 354. Hallo (N. of Lysekil); 7. II.: Depth, 30 m.: 

 1 mature male, 5 mature females and 3 juvenes; R. M. S. 355. Depth, 65 ra. : 2 mature males; 

 R. M. S. 356. — All these samples were taken by the Swedish Hydrographical 

 Biological Commission during a cruise in 1911. 



Lat. 58" N., long. 9" E. (-- S. VIII.) ; 9. VIII.: Depth, m.: 6 specimens; R. M. S. 

 364. Depth, 20 m.: 8 specimens; R. M. S. 365. Depth, 40 m.: 4 specimens; R. M. S. 366. 

 Depth, 300—0 m.: 23 specimens; R. M. S. 367. Lat. 58« 12' N., long. 10" 29' N. (= S. III.); 

 depth, 200—0 m. ; 8. VIII. : 8 specimens; R. M. S. 360. Lat. 58" 20' N., long. 10" 5' E. (= S. VII) ; 

 10. VIII.: Depth, m.: 21 specimens; R. M. S. 362. Depth, 150—0 m.: 362 specimens; R. 

 M. S. 361 and 363 (partly = the material of P. T. Cleve, 1903). 



Distribution: — The northern part of the Atlantic Ocean, chiefly north of lat. 60", and 

 the Arctic Ocean. 



The localities investigated by me were part of the previously known area of distribution. 



Conchoecia obtusata G. 0. Sars var. anfarctica G. W. MCller. 



Conchoecia obtusata var. antarctica, G. W. MUller, 1906 a, p. 77; pi. XVI, figs. 10— 23. 



1908, p. 69. 



)5 JS 



)> J> 



1912, p. 75. 



Diagnosis: — See G. W. MtJLLEH, 1906 a, p. 77. 



Remarks: — Of the specimens investigated by me the males measured 1,2 — 1,37 mm., '*'''^^'- 



the females 1,3 — 1,75 mm. Both among the males and the females there were partly specimens 

 whose shells agreed well in shape with the type drawn by G. VV. MOller, 1906 a and ])artly 

 those that resembled more or less the types reproduced by me above for the Scandinavian form. 



