22 THÉEL. NORTHERN AND ARCTIC INVERTEBRATES. II. PRIAPULIDS, ECHIURIDS ETC. 



distribution in the Baltic ought to be at Åland. At least it does not occur much 

 more toward the North. 



Levinsen (1893) reports it from the Sound, Sneckersten and Hellebsek, and 

 from the Great Belt, S. of Samso and Smaalandene. To my thinking, these state- 

 ments are of great scientific value, proving that the animals have begun to disperse 

 to the west from their centrum, the Baltic, and have accommodated themselves to 

 endure far different conditions of life. 



Echiurida. 

 Echiurus Pallasii Guérin Méne ville 1829—1843. 



I'l. I. tigs. 7—8. 



Habitat: 



Finmarken: Balsfjord, clay, low tide (Goés & Malmgren Vt o 1861), a large 

 specimen. — West Coast of Sweden: Bohuslän (Loven 1848) 1 sp. : Dyngö, algse, 

 8 fms. (Olsson), 1 sp. ; Gullmarn (Marine biol. station 1885 — 1905), many sps. ; 

 Väderöarne, shellsand and mud (Marine biol. station 3 7? 1896), a large sp. ; off La- 

 holm, clay, sand and shells, 13 fms. (Gunh. Exp. 'Vt 1878), 1 sp. ; off Helsingborg, 

 sand and clay, 18—20 fms. (Gunh. Exp. ]7 / 7 1878), 1 sp.; The Sound, S. of Hven, 

 blackish mud,* 24 fms. (Gunh. Exp. "/, 1878), 1 sp. 



Distribution in General: 



The geographical distribution of Echiurus Pallasii is very väst. It has already 

 been reported from the following localities: various places on the coast of New Eng- 

 land, Casco Bay, on the Maine coast, etc. (Verrill '1882, Wilson 1900); Greenland 

 and Iceland (Levinsen 1883); Norway : Öx Fjord in Finmarken, Sond Fjord, Bergen, 

 Christiania Fjord (Koren and Danielssen 1875 & 1877, Greeff 1880); Denmark : 

 the Sound at Hellebaek and Snekkersten, Frederikshavn and Agger (Greeff 1880, 

 Levinsen 1893); British Isles: English Channel (Greeff 1880, Shipley 1899), St. 

 Andrews (Forbes 1841, MTntosh 1875); Helgoland, Spickeroog, Norderney (Greeff 

 1880. Spengel 1880, Rietsch 1886), Coast of Belgium (Greeff 1880); Normandie: 

 St. Vaast-la-Houge (Greeff 1880). The species does not seem to have been obtained 

 on the west coast of France, though Cuénot (1902) writes: »Il est tres probable, 

 néanmoins, qu'on trouvera 1'Echiurus Pallasi sur la cöte ouest de France». 



According to the above-mentioned the species in question appears to belong 

 mainly to the North Sea and the northern part of the North Atlantic. Nevertheless, 

 to these localities may be added two new ones in the North Pacific. In 1895 Fischer 

 reports it from Amoor and in 1900 Wilson writes: »This species was found abun- 

 dantly at many different localities along the Alaskan coast south of the Peninsula 

 and on adjacent islands, nearly always in rich black mud». 



