, 2 HYDROIDA II 



Material : 



"IngolP, Holstensborg Harbour, on algae. 

 Greenland: Smallesund near Egedesminde, on algse. 



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 hydrotheca or a gono- 

 theca, but the size would seem to suggest a primary hydrotheca. 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 L,ev in 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 (1893 p. 181) at Egedesminde; 

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



Sub-family Calycellinae. 1 



Campanulinida with closing apparatus formed by the original roof of the hydrotheca. 



Gen. Calycella (Hincks). 



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

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

 the original hydrotheca 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 (I/inne) Alder. 

 1767 Sertularia syringa, L,inne, Systema Naturae, ed. 12, vol. 1, p. 1311. 

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

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



Colonies creeping. Hydrothecae 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 gonothecae are attached by short, ringed stalks to the stolons. They are oval, smooth. 

 Gonophores heteromedusoid. 



Material : 



"IngolP 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- 

 nulinina but better Calycellin<e. 



