studies on marine Ostracods 6fil 



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

 this antenna. 



Second antenna: — The endopodite is of the same type as in C. rotundafa, 

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



Sixth limb: — Of about the same t}^e as in C. rotundata. 



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

 by Gr. W. MUlIvER, sometimes somewhat pointed distally; cf. the accompanying fig. 6. 



Habitat: — Antarctic Ocean: 



S. A. E., PI. station 317, lat. oSoO'S., long. 48" 27' W.; depth, 250— () ni.; 17. I\'. 19U2; 

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

 S. 340. S. A. E., PI. station 318; at the same locality; depth, 500—0 in.; 17. 1\'. 1902; tem- 

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

 lat. 650 56' S., long. 540 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 o 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. 



(Mikroconchoecia C. Ci.ALS.) 



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

 quite 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. 



F o r s y u o n )' m y see G. W. MCl.LER, 1906 a, p. 86. 



Description: — (\ Clais, 1891 a, p. 7.'i: i^l. XX and 0. W. :\rn,l.Kl!, 1906 a, p. 86: pi. XXX. 

 figs. 1—9. 



Supplementary description: — Male: — 



Shell: — Length: According to G. W. MOLLER, 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. MtU.l.i^R; cf. the accompanying fig. 1. See n f r o m b e 1 o w (fig. 2) it has its greatest 



