4g G Canadian Arctic Expedition, 1913-1918 



The character of the s picnics of Molander's species is much like those of 

 D. islandica Danielssen in most respects, and ii may be referable to that species 

 or variety. 



Gersemia studeri, Vorrill New name. 



Paraspongodes danielsseni STUDER, op. cit., 1901, p. 31, pi. Ill, figs. 8, 9; pi. 

 X, figs. 1, 3, 7 (non Marenzeller, species, 1877). 



Since this species also belongs to Gersemia, it should have a new nnm< . 

 In mode of branching and form of the colony it is like G. rubiformis, and like 

 that species it has an abundance of ccenenchyma between the entirely retractile 

 polyps, but the polyps are more crowded with spicules in the anthocodia and 

 tentacles, while in the proximal part there are transverse rows of stouter and 

 rougher spicules. The thick spindles of the stalk are covered with sharp spinules; 

 those of the anthocodia and its wreath are slender spindles. Color in alcohol 

 was grayish brown. Off Newfoundland, in 1267 in. 



Gersemia rubiformis Pallas. (Ehr.) 



See above, page 4o, and Plate I; Figs. 1-lf. Plate II; Figs. l-4a. Plate XVIIa; 



Fig. 1. 



Additional specimens of this species were collected by Mr. Johansen in 

 1920. One is from near the entrance of Richmond gulf, in 25 fathoms, sand and 

 stones, Aug. 23. Two other specimens are from near the same place in 15 to 20 

 fathoms, stones and algae, Aug. 24, 1920. 



With this was a very interesting young specimen in hemispherical shape, 

 about 2mm. broad. It has a central polyp, surrounded by seven slightly smaller 

 unequal ones, and there are about eight to ten still smaller younger outer ones 

 irregularly alternating. The base has a thin transparent outer edge. All the 

 polyps are entirely contracted. The tissues are translucent and show the usual 

 bright red spicules. The outer polyps are quite young and imperfectly developed. 



Another specimen was taken between Great Whale river and Richmond 

 gulf, L. 56 N., August, 1920 (Johansen coll.). 



Gersemia longiflora Verrill. 



Gersemia longiflora VERRILL, Bull. Mus. Comp. Zoology, vol. XI, p. 44, pi. Ill, 

 figs. 6-6b, 1883; Annual Report U.S. Comm. of Fish and Fisheries for 1883, 

 pp. 513, 533, pi. II, fig. 13, 1885. 



Plate IV; Fig. 8. Plate XIV; Figs. 3, 3a, variety. Text Fig. 13. Type. 



This species has a naked stalk, sometimes bulbous at the base and enclosing 

 mud, though it evidently starts adhering to some solid object; most frequently 

 a dead gorgonian axis. It branches openly and the polyps lie along the elongated 

 branches, rather loosely. They are longer than in most species and nearly 

 cylindric, with little or no ccenenchyma between them. The spicules of the type 

 are nfctably slender (PL IV, fig. 8). Most of them are slender warted spindles 

 and slender oblong foims; some are almost rod like. They are more slender than 

 in any other described species of this genus, and quite unlike those of G. fruiicosa, 

 which has a similar mode of branching. Jungersen's supposition that it was the 



