HVDROIDA II 



155 



would seem to be exclusively due to confusion with Ca?npanularia Johnstoni Alder (cf. Broch 1912 p. 

 51). The species belongs chiefly to the littoral region, especially its upper half, but may quite excep- 

 tionally penetrate some way down into the abyssal. Within the waters investigated, Campanularia 

 volubilis is one of the most common Campanulariida; it is but rarely found, however, out in the open 

 sea regions, which must probably be understood as standing in connection with its bathymetrical 

 character (fig. LXXX). The species is not uncommon in West Greenland waters, but on the east 



200 m. 600m. 1000m. 2000m. 



Fig. LXXX. Thi' distribution of Campanularia volubilis m the Xorthern Atlantic. 

 In the hatched regions a common although scattered occurrence is stated. 



coast of Greenland it has only been met with north of 76 . Of the Iceland coasts, it seems to prefer 

 the east and west; it is less frequent at the Faroe Islands, and is stated as being of common, though 

 scattered occurrence round the British Isles and off the west coast of Norway. 



Campanularia verticillata (Linne) Lamarck. 

 175S Sertularia verticillata, Linne, Systema naturce, Ed. 10, p. 811. 

 1816 Campanularia verticillata, Lamarck, Histoire naturelle. vol. 2, p. 113. 

 uec. 1907 Campanularia verticillata. Hickson and Gravely, National Antarctic Expedition, p. 23. 



Upright, stiffly built rhizocaulomes, from the numerous tubes of which the hydrotheca stalks 

 proceed, arranged approximately in wreaths. The stalks exhibit distinct rings, which are most pronoun- 

 ced near the origin, and nearer the hydrotheca; the stalk always terminates under the hydrotheca in 



a ball-shaped joint; the middle of the stalk is generally smooth. The hydrotheca is about twice as 



20* 



