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



Haleci niii muricatum (Ellis & Sol.). 



Several colonies, always furnished with the characteristic spiny gonothecae. 

 The adcauline margin of the hydrotheca more markedly curved than the abcau- 

 line one. 



Localities: Novaja Semlja, Besimannaja Bay, 35 fathoms, sandy clay, July 1, 

 1875 (Swed. No v. Semlja Exp.); d:o, Matotschkin Sharr, off Beluscha Bay, 10—15 

 fathoms, clay and stones, Ang. 3, 1876 (Nordenskiölds Exp.); Spitzbergen, Waygat 

 Islands, stonyground, 30 fathoms, Aug. 1861 (Swed. Spitzb.-Exp.); The Banks of 

 Newfoundland, 47° 8' N., 52° 28' W., 92 fathoms, sand and stones, Aug. 15, 1871 

 (Dr. J. Lindahl). 



Haleciimi Beaiii Johnst. 



Locality: Baffin's Bay, 68° 8' N., 58° 47' W., 169 fathoms; stones and clay, 

 July 24, 1871 (Dr. J. Lindahl). Fertile female colonies are present. 



Obelia longissiina (Pallas). 



The material consists of luxuriant specimens and also several fragments. Margo 

 of the hydrotheca almost or entirely smooth, only in a few hydrothecae have I 

 observed shallow teeth or waves. 



Localities: Greenland, Sukkertoppen, on Laminaria, 2 V'j 1870 (Swed. Aret. Exp. 

 1870); Bering Sea, 64° 30' N., 171° 45' E., 43 mtr., stonyground, 31 / 7 1879 (Vega-Exped.). 



Gonothyraea Loveiii Allm. 



Locality: Murman Sea, Lumbowski, 21 — 37 fathoms, 7s 1877 (Sandebergs Exp.). 

 Small colonies on Sertularia cupressinaJLm. 



Oonotliyraea hyalina Hincks. 



Localities: Kära Sea, 70° 25' N., 62° 30' E., 55 fathoms, claybottom, Aug. 8 

 (Nordenskiölds Exp. 1876); Spitzbergen, Lommebay 9 / ; » 1868 (Swed. Spitzb.-Exp.). 



Cainpaimlaria integra Mc Gill. 



Hydrothecae rather long, nearly cylindrical, borne on elongated, smooth pedi- 

 cels, which only have a double annulation below the hydrotheca. The hydrotheca 



