6 JÄDERHOLM, NORTHERN AND ARCTIC HYDROIDA FROM THE SWEDISH ZOOLOGICAL STATE MUSEUM. 



Grammaria immersa Nutt. 



Hydrothecae almost wholly immersed; only a short portion of the distal end 

 is free. The hydrothecae are less bent outward than in the case of Grammaria abie- 

 tina and the aperture is not everted. Sparingly collected and sterile. 



Localities: Spitzbergen, Brandewijnebay at a depth of 10 — 15 fathoms, stones, 

 5 /a 1868 (Sw. Spitzb. Exped.); d:o, Norwegian Islands, 18 — 25 fathoms, härd bottom, 

 iy /8 1872 (Sw. Spitzb. Exp. 1872—73); Greenland, Baffin's Bay, 67° 59' N., 56° 33' W. 

 at a depth of 98 fathoms, stones and mud, ' 2C 'j-, 1871 (Dr. J. Lindahl). 



Grammaria abietiua M. Särs. 



Locality: Kära Sea, 70° 20' N., 66° E., 9 fathoms, härd bottom, I2 / 8 1876. A 

 single, fertile specimen and several fragments (Nordenskiölds Exped.). 



Filelluin scrpens (Hassall). 



Localities: Novaja Semlja, Matotschkin Sharr, near Tschirakina, 9 — 15 fathoms, 

 sand and clay, growing on Serlularella tricuspidata, 13 /y 1876 (Nordenskiölds Exped.); 

 Greenland, Disco, Nordfjord at a depth of 27 fathoms, härd, grey cla}^ on Sertula- 

 rella tricuspidata, lu ,7 1871 (Dr. J. Lindahl). 



Toichopoma obliquum (Hincks). 



Locality: North Greenland, Tessiursak, 3 — 8 fathoms, grey clay and rotten 

 algae, 21 /i 1883. Some small, young stems (Sophia-Exped.). 



Stegopoma plicatile (M. Särs). 



Localities: Kära Sea, 71° 54' N., 67° 57' E., 36 fathoms, claybottom, 7 / 8 1875 

 (Sw. Novaja Semlja Exp.); North Greenland, 250 fathoms, claybottom (Prof. Otto 

 Torell). Only a fragment of a colony and two small specimens are collected. 



Tetrapoma quadrideiitatiiiii (Hincks). 



Localities: Spitzbergen, Norwegian Islands, 18 — 25 fathoms, härd bottom, 13 /s 

 1872 (Sw. Spitzb. Exp. 1872—73); Greenland, Disco, Nordfjord, 27 fathoms, härd, 

 grey clay, "V? 1871 (Dr. J. Lindahl). Only a few sterile individuals, growing on 

 Sertularella tricuspidata and Lafoéa gracillima are found. 



