studies on marine Ostracods ""' 



are bare. Yellowish-brown corpuscles of pigment are found at least in the proximal part of 

 this antenna. 



Second antenna: — The e n d o p o d i t e is of the same type as in C. rotundata, 

 but I never found either of the c- and d-bristles developed. 



Sixth 1 i m b : — Of about the same tj^De as in C. rotundata. 



Rod-shaped organ: — This is sometimes of the type described and reproduced 

 by G. W. MULLER, sometimes somewhat pointed distally; cf. the accompanying fig. 6. 



Habitat: — Antarctic Ocean: 



S. A. E., PI. station 317, lat. 53" 0' S., long. 48" 27' W.; depth, 250—0 m.; 17. IV. 19o2; 

 temperature at 250 m. and at the surface, + 3",40 C. and + r',30 C: 1 mature female; R. M. 

 S. 340. S. A. E., PI. station 318; at the same locality; depth, 500—0 m.; 17. IV. 1902; tem- 

 perature at 500 m., + lo,50 C: 1 mature female; R. M. S. 341. S. A. E., PI. station 44 b, 

 lat. 650 56' S., long. 54" 35' W.; depth, 700-0 m.; 22. I. 1902; temperature at the surface 

 — 1",15 C: 3 mature males 4 mature females and 1 juvenis; R. M. S. 239. 



Distribution: — In the Antarctic Ocean S. of lat. 55 ° S. 



A couple of my above-mentioned finds thus come from localities somewhat north of the 

 previously known region of distribution. 



Curta group G. W. Muller. 



{MikroconcJioecia C. Glaus.) 



This group, which includes two forms in addition to the two dealt with below, is certainly 

 qiute a natural one. The careful comparative investigation to which I subjected the two 

 following species affords, at any rate, very strong evidence in favour of this. 



Conchoecia curta J. Lubbock. 



For s y n o n y my see G. W. Mt'LLER, 1906 a, p. 86. 



Description: — C. Claus, 1891 a, p. 73; pi. XX and G. W. MOller, 1906 a, p. 86; pi. XXX, 

 figs. 1—9. 



Supplementary description: — Male: — 



Shell: — Length: According to G. W. MtlLLER, 0,75—0,95 mm. The specimens 

 investigated by me measured 0,7 — 0,9 mm. Length : height about 1,6 : 1; length : breadth 

 about 1,75 : 1. Seen from the side it is of the type described and reproduced by 

 G. W. Mt'ELER; cf. the accompanying fig. 1. Seen from h e 1 o w (fig. 2) it has its greatest 



