studies on marine Ostracoiis GOl 



male; R. M. S. 201. S. A. E., PI. station 8 b, lat. 21" 51' N., long. 23" 0' W.; at the surface; 

 11. XL 1901; temperature, 23,20" C. : 2 mature males, 4 mature females and 2 larvae; R. M. S. 

 192 and 193. S. A. E., PI. station 46, lat. 2P 51' N., long. 23« 0' W.; at the surface; 11. XI. 

 1901; temperature 23,2" C: 1 mature female and 1 juvenis; R. M. S. 202. S. A. E., PI. station 

 53, lat. 18" 10' N., long. 24" 28' W.; at the surface; 13. XL 1901; temperature, 23,8" C: 1 mature 

 female and 1 juvenis; R. M. S. 203. S. A. E., PI. station 12 b, lat. 14" 28' N., long. 26" 1' W.; 

 at the surface; 15. XL 1901; temperature, 25,50" C. : 14 mature males, 16 mature females and 

 2 juvenes; R. M. S. 194. S. A. E., PI. station 14 b, lat. 12" 21' N., long. 26" 49' W.; at the 

 surface; 16. XL 1901; temperature, 26,0" C. : 3 mature males, 6 mature females and 2 juvenes; 

 R. M. S. 195 and 196. S. A. E., PI. station 18 b, lat. 1" 31' N., long. 29" 7' W.; at the surface; 

 22. XL 1901; temperature, 26,8" C: 2 mature males; R. iVI. S. 197. S. A. E., Ph station 116, 

 lat. 15" 46' S., long. 34" 8' W.; at the surface; 1. XIL 1901; temperature, 26,2" C: 1 mature 

 male; R. M. S., on slides. S. A. E., PI. station 23 b, lat. 19" 19' S., long. 36" 9' W.; at the 

 surface; 3. XIL 1901; temperature, 25,2" C: 3 juvenes; R. M. S. 198. 



Distribution: — Atlantic Ocean from lat. 60" N. (V. VA\i<a, 1906) to lat. 40" S. 

 (G. W. MtJLLER, 1906 a). Pacific Ocean from lat. 33" N. (Cll. Juday, 1906) to lat. 47" S. 

 (G. S. Brady, 1880). Indian Ocean. 



The stations of the Swedish ,,A n t a r c t i c" expedition at which this species was found 

 are all within these limits. 



Genus Conchoecia J. D. Dana. 



For synonymy see G. W. MULLER, 1912, p. 59. 



Description: — Shell: — This varies in shape. The rostrum is always well developed 

 and is in most cases somewhat more bent ventrally in the females than in tlie males. The 

 surface of the shell is furnished with only quite a few bristles or has none at all. The pores 

 of the surface always seem to be moderately large and in most cases not difficult to establish. 

 The selvage was almost always developed in the following way in the species of this genus that 

 were investigated by me: On the rostrum it is rather broad, growing rapidly narrow dorsally 

 and ventrally; it is narrow along the incisur; ventrally of the incisur it increases evenly in breadth 

 and is rather broad along the anterior margin of the shell and the anterior part of the ventral 

 margin of the shell; posteriorly it decreases again rather evenly in breadth and is always very 

 narrow inside the ventral part of the posterior margin of the shell; at about half the height 

 of the shell or somewhat dorsally or ventrally of this, inside the posterior margin of the shell, 

 the selvage practically ceases altogether, although it can, at least sometimes, be traced still' 

 more dorsally in the shape of an exceedingly fine line. (If nothing special is said about it in 

 the following descriptions of species, it is to be taken as meaning that the selvage agrees with 



7,oo\q<,:. liidraK, Uppsala. Suppl.-Brt \. '9 



