32 



HYDROIDA II 



Material : 



"Ingolf", Holstensborg Harbour, on algse. 

 Greenland: Smallesund near Egedesminde, on alga;. 



In one of the colonies from Smallesund, a distinct renovation is discernible; unfortunately, it 

 cannot be determined with certainty whether the primary individual has been a hvdrotheca or a gono- 

 theca, but the size would seem to suggest a primary hvdrotheca. We have in this case not a hetero- 

 morphotic renovate, as the renovate is a fully developed, stalked hydranth. The instance in question 

 calls to mind Levin sen's description (1892) of renewal of individuals in certain Campanulariidce. 



The new find of Campanulina turrita from Greenland is highly interesting. Since Hi neks 

 found the species in Ireland it has only been recorded by Levinsen ( l £>92> P- 181) at Egedesminde; 

 from Holstensborg Harbour, the "Ingolf" brought home a whole series of finely developed colonies. 



Sub-family Calycellinae. 1 



Campanulinidoe with closing apparatus formed by the original roof of the hvdrotheca. 



Gen. Calycella (Hincks). 



Creeping colonies with tubular hydrothecse, the closing apparatus sharply marked off from the 

 hvdrotheca itself, and easily falling off. The closing apparatus is formed by the peripheral parts of 

 the original hvdrotheca roof, the central portion of which is discarded; the closing apparatus is a folding 

 membrane folding conically over the indrawn polyp. The hydrotheca lacks diaphragm. 



Calycella syringa (Linne) Alder. 

 1767 Scrtnlaria syritiga, Linne, Systema Naturae, ed. 12, vol. 1, p. 1311. 

 i860 Calicella syringa, Alder, Descriptions of a Zoophyte . . ., p. 73. 

 1868 Lafoea pygmtza, Alder, pars, Hincks, A History of the British Hydroid Zoophytes, p. 205. 



Colonies creeping. Hydrothecse tubular, often somewhat bent, with slightly outward curving 

 opening margin; they are borne upon stalks, short or long, furnished with a varying number of rings. 

 The closing apparatus is sharply marked off from the thicker wall of the hydrotheca, and easily falls 

 off; it consists of an entire membrane, which folds down on definite lines, forming a conical roof over 

 the indrawn polyp. 



The gonothecse are attached by short, ringed stalks to the stolons. They are oval, smooth. 

 Gouophores heteromedusoid. 



Material: 



•'IngolF 1 St. 95 65°i4' N., 30°39' W.; depth 752 fathoms, 2,1° 



"Thor" 64°i6' N., 22°i7' W.; — 50 metres 



6 4 °02' N, 22°33' W.; - 34 - 



1 As the genus Campanulina belongs to the preceding subfamily, the present subfamily should not be called Campa- 

 milinina but better Calycellince. 



