50 AXEL OHLIN. ARCTIC CRUSTACEA. 



Diastylis sjmmlosa is obtained at the Ibllowing places viz., 

 Baffin Land and Xorth Greenland (Oulix), West Greenland 

 (HaxsExV), East Greenland (Swed. Aretie Exp. 1899), Spitz- 

 bergen (Swed. Arctic Exp. 1898). Finmarken (Särs), Barents 

 Sea (Särs. Hoek). Franz .Toseph Land(?) (Heller), Kära Sea 

 (Stuxberg). Tlius it seenifä to liave an exdnsively Aretie dis- 

 tribntion. If it may be regarded as eircnnipolar, although 

 very probably that mu>st l)e left to futiire re.searehes to decide. 



Length of greate.st spec. (male) 18 mm., breadth 4 mm. 



Diastylis polaris G. O. Särs. 



187-i. Diastylis jiolaris G. O. Särs, Cumaoeor fra do storo Dybiler 

 etc, 1. c. p. 797. 

 5- stygia G. O. Sars, ibm. p. 798. 



1873. polaris G. O. Sars. Om Cumaceer fra do storo Dyb- 



der etc. 1. c. p. 4, pl. 1. figs. 1 — 3. 

 » > stygia G. O. Sars ibm. p. 6, pl. 2, figs. 4 — 7. 



1879. polaris NORMAN, Crustacea. Cumacea of the 'I.ight- 



ning' etc, 1. c, p. 56. 

 i 3 stygia Norman, ibm. p. 58. 



1887. stygia G. O. Sars, Report ou the Cumacea etr.. 



Challenger Exped. 1. c. ]>. 44, pls. •'». 7. 8. 



Localities: 



Stat. 26. lat. 78° 19' N., long. 8=41' E., »the Swedish depth>, depth 

 2700 m., bottom temp. — 1.4' C, biloculina day, 25 VII 

 1898, two spec. 



27. lat. 77" 52' X., long. 3^ 5' W.. 40' SW. of »the Swedish 

 depth», depth 2750 m., bottom temp. — l.i' C, biloculina 

 clay. 29 VII 1898, three spec. 



28. lat." 76 36' N., long. 12 10' E., 50 W. of Horn Sound. 

 depth 1750 m., bottom temp. — l,:r C, transition clay. 

 1 VIII 1898, one spec 



This species was first detected during tbe Swedish Polar 

 Expedition 1868 in the Aretie Ocean, and a great interest is 

 attaehed to it, because this little crustacean was the first of 

 higher organized animals to be brought up from the abyssal 

 depths, thus indicating that even in those regions where 

 aiternal darkness reigns and no vegetable life can flonrish. 

 animal life, however, exists in its niore developed form. As 

 we are all aware. the year 1868 is regarded as the beginning 

 of the new tera in deep-sea researeh, and we owe that mainly 

 to the discovery of Diastylis polaris by the Swedes. 



