156 



HYDRi (IDA II 



long as broad, cylindrical, with a curved basal part tapering sharply towards the stalk. The hvdro- 

 theca is circular in transverse section near the aperture; the opening margin is furnished with ten to 

 fourteen low, rounded teeth. The basal cavity of the hydrotheca is small; the limit between this and 

 the large main chamber is formed by a low, but often fairly narrow and sharply defined ring-shaped 

 inner thickening of the wall. 



The gonothecse proceed from the tubes of the rhizocaulome, and are attached to the same by 

 an almost rudimentary stalk. They are bottle-shaped, with a broadly rounded basal part, and a short, 

 rather narrow, tubulous neck, as a rule curved or somewhat asymmetrical. 



.Material: 



"Ingolf" St. i2j 66°33' N., 20^05' W., depth 44 fathoms, 5,6°. 

 "Thor" 64°02' N., 22°33' W., depth 34 metres 



— 63030' N., 2o°i4' W., 80 — 



Greenland: Davis Strait, depth So fathoms (without further details) 



— , 67°24' N., 55°39' W. (depth not stated). 

 Iceland : Vestmano, depth 49 fathoms. 

 The Faroe Islands: 6 miles N. by W. of Store Kalso, depth 60 fathoms 



Glyversnses near Thorshavn. together with red algae (depth not stated). 



Campanularia verticillata is a circumpolar arctic-boreal species, penetrating onlv slightly to the 

 south, but still met with off the coast of France. The statements in one or two recent works, how- 



200 m, doom looom. 2000m. 



Fig. I. XXXI. The distribution of Campanularia verticillata in the northern Atlantic. 

 In the hatched regions the literature notes a common occurrence. 



