HYDROIDA II 117 



Abietinaria abietina (Lin 11 6) Kirch enpauer. 



1758 Serfiilaria abietina, Limie, Systema iiaturce, Ed. 10, p. 808. 



1884 Abietinaria abirtiiia, Kirchenpauer, Nordisclie Gattimgen und Arteii von Sertiilariden, p. 29, 35. 



Coarseh' built, pinnate colonies, the branches often secondarily branched pinnately in the same 

 plane. The stem is zigzag, with paired subalternating hydrothecse in two rows, there are as a rule 

 three, more rarelv four hydrotheca; on the stem between two successive branches on the same side^ 

 the lowest in the branch angle. The hydrothecte of the branches are set subalternately iu pairs, and 

 in two opposite rows. The hydrothecse are large, swollen at the lower end, narrowing upwards and 

 terminating in a short slightly outward curving neck; the aperture lies obliquel\- or more rarely perpendi- 

 cular to the branch axis; the margin has no adcauline sinus; the opercular plate is attached adcaulinally. 

 The free distal part of the adcauline wall is more than half the length of the hydrotheca, and about 

 twice that of the opening diameter. The interval between two successive hydrothecse on the same 

 side is from half to once the length of the ludrotheca, rarely a little less. The diaphragm is of dis- 

 tinctly bilateral structure, with a narrow egg-shaped cleft, the longitudinal axis of which lies in the 

 broad plane of the branch. 



The gonothecte proceed from close under the basis of the hydrothecse, and are as a rule set 

 on the upper side of the branch. They are oval, with a short, almost rudimentary stalk, and have a 

 short, broad cylindrical neck. 



Material : 



"Thor" 65°52' N., 23°58' W., depth 62 metres 



- 62=29,5' N.,24°56' W., — 40 — 



- 64°i6' N., 22°i7' W., — 50 — 



- 64°o2' N., 22°33' W., - 34 - 



-- 63=30' N., 20° 14' W., — 80 — ■ 



- 6i°07' N., 9^^3o' W., - 835 - 



Greenland: Store Hellefiskebanke, off Holstensborg, depth 18—20 fathoms. 

 Iceland: Bakkefjord (depth not stated) 



Seydisfjord, depth 6 fathoms 



Off Seydisfjord (depth not stated) 



Reydarfjord, depth 50 fathoms 



Ingolfshofdi 9' , miles in N. by E.V2 E. (depth not stated) 



Vestmano, depth 25 fathoms 



Reykjavik (depth not stated) 



Hvalfjord, depth 24 fathoms 



Bredebugt, 64=45,8' N., 23=55,2' W., depth 30 fathoms 



6 miles W. of Iceland, 65=00' N., 24=38' W., depth 22 fathoms 



Patreksfjord, depth 7 — 25 fathoms 



Axarfjord, — 18 — ' 



