10 o. NQRDGÅIU) [1922 



genetic hint to a phylogenetic interpretation. (See O. Ahi:l, 191G, 

 p. 162). 



Rossia glaiicopis Loven. 



Rossia glaucopis Lovkx, 1816, p. :?. 



— G. O. Sars, 1878, p. ;^;57, 1)1. 82. 



LovÉN's original description was l)ased on a specimen from Fin- 

 mark. I have caught R. glaucopis at difierent times of the year and 

 at manv localities in the Trondhjem region from Froyf jord to Beit- 

 sladfjord in deplhs of ca. 50 to 350 m. In spite of its common oc- 

 currence in the Trondhjem Fjord it is probable that this species 

 should be considered as an arctic one. 



Distribution. — East Spitsbergen ( Krause, 1892, p. 372); 

 West Spitsbergen (Kxipowitch, 1901, p. 104); Between Spitsbergen 

 and Bear Island and between Bear Island and Norway vFrielk 

 and GiuKc. 1901, p. 124); Xorwegian coast (G. O. Sars 1878, p. 338); 

 Bohuslen (Lonnhkrg. 1891, p. 13); Shetland (R. papillifera Jef- 

 FREYS, 1869, p. 135); Off the south of Ireland (Massy, 1909, p. 20); 

 jan Maven (Becher, 1882—83, p. 81); Greenland (Posselt and Jen- 

 sen, 1898, p. 275); N. E. America, Nova Scotia to ca. 32° N. (R. siib- 

 levis Verrill, 1881, p. 356). — 



Eggs containing embryos of R. glaucopis are drawn by G. O. Sars 

 (1878, pi. 32). The eggs of glaucopis are a little smaller than those 

 of macrosoma with a greyish white colour, diam. 7 — 8 mm., or 

 8 — 9 mm. The egg-capsules of macrosoma I have always taken on 

 hard boltom, but the eggs of glaucopis are commonly found on 

 muddy bottom enclosed in soft sponges. In V. Storm's collection I 

 have seen such eggs from Hasselvik, Rissa, August 1883. Most of 

 the embryos had a great yolk-sack, but some of them Nvere on the 

 point of being hatched, one young was hatched, lenglh of the 

 mantle 7 mm., length from end of body to the tip of the short arms 

 ca. 15 mm. 



On V« 1914 I took in Leangen at Trondhjem at a deptli of 150 m., 

 muddy bottom, a soft sponge containing youngs and eggs of R. glau- 

 copis with pigmented embryos. In the hatched youngs length of 

 the mantle was 7—7.5 mm., and length from end of body to the tip 

 of short-arms 14—17 mm. Hence niay be concluded that a young 

 caught '"/fi 1912 in Froyf jord, ca. 100 in., with a length of mantle 

 10.5 mm., and length from end of bodv to the tip of short arms, ca. 

 22 mm., had been recently hatched. 



Eggs of R. glaucopis were taken by the Norw. N. Atl. Exp. '77 

 1878 at a station between Bear Island and Norway, depth 408 m. 

 (Frieee and Grieg, 1901, p. 124). In the summer 1889 Kukenthal 

 and Walther at East Spitsbergen collected both adults and eggs 

 of R. glaucopis (Krause, 1892, p. 372). According to Kukenthal's 

 communicalion to the Geogr. Soc. of Berlin (1890) the zoologicai 



