386 P- К«АМР- 



by two lines crossing each other at right angles (see p. 382 — 383 and 

 pi. XXIV, fig. 15). 



Hab.: St. 71 a. 



Depth: 30— 40 m. 



Geographical distribution: Arctic: Greenland, Spitzbergen, 

 Murman Sea, White Sea, Siberian Polar Sea. 



Not earlier known from East Greenland. 



Genus Lafoëina G. О. Sars. 

 Lafoëina maxima Levinsen. 

 Cuspidella grandis Winther 1879 [58] p. 275. 



Lafoëina maxima Levinsen 1892 [38] „ 175 & 182. Tab. VI, Fig. 9— 12. 

 „ „ Broch 1909 [17] „ 165 & 213. Textfig.23,Tab.III, 



fig. 7. 

 A number of colonies of this purely arctic species were found 

 at 3 stations; the largest colony (St. X) is 9 cm. high. 



The operculum is formed from the uppermost part of the 

 hydrothecal wall (see p. 382). 

 Hab.: St. 71a, 95a, X. 

 Depth.: 30— ca. 100 m. 



Geographical distribution: Arctic: arctic America; Green- 

 land, Spitzbergen, Iceland, Northern Norway, Murman Sea, north 

 coasts of Europe and Asia, as far as the New Siberian Islands. 



Fam. Sertularidae. 



Genus Sertiilarella Gray (Levinsen modif.) 

 Sertularella tricuspidata (Alder) Hincks. 

 Plate XX, figs. 5—7. 

 Sertularia tricuspidata Alder 1856 [1] p. 111. PI. IV, figs. 1, 2. 



Sertularella „ Hincks 1868 [28] ,. 239. PI. 47, fig. 1. 



„ ,, Thompson 1887 [57] „ 394. PI. 14, fig. 3. 



„ „ Markt.-Turn. 1895 [43] ,, 425. Taf. 11, Fig. 4, 



Taf. 13, Fig. 9. 

 Schydlowsky 1901 [52] „ 201. 

 „ „ Nutting 1904 [46] „ 100. Pl.XXV,fig.3-7. 



Broch 1909 [17] „ 168&214.Textfig.25. 



A large quantity of well-developed colonies of this species, which 

 is common in all arctic seas, is present from St. 71 a, as also some 

 few, small colonies from St. 95 a. 



On some colonies, almost all the hydrothecae show renovation, 

 often 5 — 6 times, even up to 10 times, so that 11 hydrothecal rims 

 in all can be counted; these rims ahvavs lie close to one another. — 



