40 AUGUSTA ÄRNBÄCK-CHRI8TIE-LINDE, NORTHERN AND ARCTIC INVERTEBRATES. 



50 — 120 fms; Moster, 9—15 fms; Hardangerfjord; Bergen, 55—200 m; Trondhjems- 

 fjord, etc. (ef. Hartmeyer 1903, Grieg 1913). It is rare on the Norwegian north 

 coast, where it has been collected at Risö off Tromsö, 10 — 12 m; Helgeland, Trae- 

 nenhavet, 260 m (Bjerkan 1908), in the Atlantic, 70° 55' N— 18° 38' E, 196 m 

 (Bonnevie 1896). It is also sparingly met with in the White Sea, off the Murman 

 coast and Spitzbergen (Redikorzew 1906). In southern zones P. pomaria has a 

 wider distribution and occurs abundantly. It has been reported from the Faroe 

 Islands, Ireland, the British coasts, Denmark, Sweden, the coast of France and the 

 Mediterranean (Traustedt 1880, Hartmeyer 1903, 1912, Carlsson 1918). 



Remarks. 



P. pomaria is widely distributed and has its centre of distribution in southern 

 regions, being common in the Mediterranean and along the coasts of north- 

 western Europé. In the eastern Boreal region it is abundant in the North Sea, 

 along the south and west coasts of Norway, occurring in dusters with masses of 

 specimens, and common in adjacent waters, off the coast of Bohuslän in Gullmar- 

 f jorden. It ought to be noticed that it is rather sparingly met with off the Danish 

 Islands. In the Boreoarctic mixture zone this species is not common, rather rare, 

 and in the Arctic region only two localities off Spitzbergen are known for certain 

 yet. 1 It is remarkable that P. pomaria is unknown from the American coast. 



This species often occurs in dusters, on rocky bottom or on bottom of stones 

 with gravel, sometimes clay with stones. It is often found in deep water, down to 

 450 m. 



Dendrodoa grossularia Van Beneden 1846. 



Pl. 2, figs. 34—38. 



Syn. Cynthia grossularia, Särs 1870. 



Stfjela » Herdman 1884. 



» » Kiaer 1893, 1896. 



Styelopsis » Traustedt 1882. 



» » Hartmeyer 1903. 



Habitat: 



West coast of Siveden: Bohuslän, Gullmarn, without definite locality, a great 

 number of specimens (1871 Loven, 1885, 1893 Floderus, 1894 C. Aurivillius) ; 

 Humlesäcken, 60 fms, many sps; Strumpeskagen, 3 sps (July 17, 1876, Bovallius); 

 Strömmarna, many sps (July, 1894, Floderus); Skårberget 100 fms, clay, 8 sps; 

 D:o 60 — 70 fms, many sps (August 1884, July 1890, C. Aurivillius) ; Alsbäck-Skår- 

 berget, 70—80 fms, many sps (August 1890, Carlgren). — Saltkällefjord, 8 sps 



1 Swederus (1. c. p. 106) has reported 3 specimens from the Bering Sea, Cape Nunamo, depth 4 — 6 

 fms, a statement whieh cannot be verified, the species not being represented in the collections of the Vega 

 Expedition in the Swedish Riksmuseum. 



