HYDROIDA 27 



recorded from Spitzbergen at the depth of only 38 m. (Broch 1909). Evidence of its occurrence 

 in the Kara Sea is still wanting. From this locality a specimen is in hand, determined by Bergh 

 (1887) as Tubular ia regalis. As a matter of fact, the specimen is a Corymorpha, probably a Cory- 

 morpha glacialis M. Sars. -- A remarkable exception to the habitat stated is formed by the frequent 

 occurrence of the species in the Trondhjem Fjord, where it is found in abundance on the Lophohelia- 

 reefs. In spite of the luxuriant development which it attains in the Troudhjem Fjord, it must probably, 

 like Corymorpha grocnlandica (Allnian), Myriothcla phrygia (Fabricius), and Stcgopoma plicatile 

 (G. O. Sars), be accounted for as an arctic relict in this locality. 



Tubularia larynx Ellis et Solander. 

 1786 Tubtdaria larynx, Ellis et Solander, The Natural History of Many Curious and Uncommon 



Zoophytes, p. 31. 

 1864 humilis, A llm an, Notes on Hydroida, p. 57 and 60. 



Colonies whose long polyp stems, generally unbranched and irregularly curved, are separated 

 quite down to the tangled network of basal tubes. The stems are covered with a fairly vigorous, but 

 colourless perisarc, which is irregularly wrinkled or more rarely quite smooth. The polyp wears a 

 basal whorl of up to 25 tentacles, attaining a length of 8 mm.; the numerous distal tentacles, 2 or 3 

 mm. long, are densely crowded round the orifice in a whorl consisting of several rows. 



The gonophores are eumedusoid, without radial canals, but with a rudimentary circular canal; 

 they are most frequently provided with three rudimentary tentacles. The gonophores are supported by 

 6 12 short blastostyles, which may be erect or hanging. The actinula larvae, when deliberated, show 

 filiiorm tentacles. 



Material : 



Iceland: Reykjavik. 



Gustsey depth 4 fath. 



Keflavik 15 l6 



Faxebugt three miles N 37 E Keflavik 19,5 



Off Havnefjord 25 



Stykkisholm 2030 



Skagi 40 m- 



Vestman Islands 28 fath. 



The Faroe Islands: Andefjord 1623 



The North Sea 6o35' N., iso' W 5 



The synonymy of the varying species has been thoroughly accounted for by Fenchel (1905). 

 He points out that, as is also maintained by Bonnevie (1899) and by Swenander (1903), Tubularia 

 coronata Abildgaard must be subsumed under Tubularia larynx. On the other hand, it is not plainly 

 seen whether he regards Tubularia humilis All man to be a peculiar species. On a closer exami- 

 nation, indeed, the characters pointed out by Bonnevie (1899) as distinguishing marks, prove to 

 be of no particular systematic importance. The wrinkling of the stem is strongly varying from 



4* 



