28 AXEL OHLIN, ARCTIC ORTSTACEA. 



The male is as usual of a greater size and of a more 

 elongate shape than the female. To show that, 1 give tlie 

 following measnres: 



length of the greatest male (from stat. 30) .... 

 breadth » ■■> v . » .... 



length » -v ^> female (from the same stat.) 



breadth » » > » :> 



See also ligg. 5 a — b. 



The colonr is very varial)le accordingly to the bottom 

 where it lives. The gronndcolour is a yellowi.sh-gray which 

 becomes darker, and nearly a grayish-black in speeimens from 

 gray clay. The dorsal middle line and the npper snrface of 

 the speeimens, especiall}" of the first and fourth segment, are 

 a beautifnlly elonded purple. The upper side of the pednn- 

 cnlar joints of the antennse has the same colonr and, in all 

 cases. the middle joints (7, s, 9, 10) of the ilagellnm of the 

 same antenna are colonred thronghont in the saine way. In 

 speeimens living in a rocky bottom this pink coloration is 

 most extensive and nearly disappears in the darker ones from 

 a clay bottom, except the purple ring of the antennse. 



As to geographical distrilnition, this species is now ob- 

 served from the following places: West-Spitzbergen, ]\I agda- 

 lena l)ay (Norw. North Atlant. Exp.), Ice Islands (Swed. 

 Arctic Exp. 189S), vStorfjorden (von Heuglin), Hope Island and 

 King Charles Island (Öwed. Arctic Exp. 1898), Barents Sea 

 (Willem Barents Exp. ls80), Kära Sea (I)ijmphna Exp.), Si- 

 berian Sea (Vega Exp.), otf Alaska and the Polar Archi- 

 pelagö (Harger), Baffin Land (Xil.sson 1894), Labrador and 

 New England (Harger). Bnt as yet it has not been observed 

 either in the West-, or on the East coast of Greenland nor in 

 the sea between Greenland and Spitzbergen, except those two 

 above mentioned localities, where it seems to occur but very 

 scantily. All stations, even those on West Spitzbergen, be- 

 long to the cold area, where the polar cnrrents prevail, and 

 the Gulf Stream has but little, if an}^ influence. Neverthe- 

 less I do not donbt that the species is circnmpolar, and that 

 it will r\^o be found by fnrther explorations off East Green- 

 land. As it is an inl^bitant of shallow water (its vertical 

 distribution being from 10 — 200 m.), it is not at all sur- 

 prising that it has not been trawled in the deep sea between 

 P^ast Greenland and Spitzbergen. 



