[fraser] HYDROIDS OF THE VANCOUVER ISLAND REGION 143 



proximally and distally;hydrotheca cylindrical, at least twice as deep 

 as wide, suddenly constricted at the base where the diaphragm ap- 

 pears inside, the part below the diaphragm being little larger than the 

 end of the pedicel. Teeth 10-12, sharp-pointed and rather deeply 

 cut. 



Gonosome. — Gonophores given off from the stolon, or occasionally 

 from the pedicel, supported on short pedicels with one or two an- 

 nulations; gonangium smooth, oblong or slightly obovate, narrowing 

 slightly just below the brim. 



Distribution. — Off Pt. Richardson, near Friday Harbor. 



Torrey has described a species which he has named Campanularia 

 hesperid 20 that as he says, shows little difference from Clytia cylindrica 

 except in the number of the tentacles. The Friday Harbor specimens 

 have the fewer number of tentacles corresponding to the eastern 

 species and have the gonangium and contents similar to that form. 



Clytia edwardsi (Nutting) 



PI. XIII, Fig' 41 



Gonothyrœa gracilis Calkins, Some Hydroids of Puget Sound, 1899, 



p. 350. 

 Campanularia edivardsi Nutting, Hydroids of Woods Hole, 1901, 



p. 346. 

 Clytia edwardsi Fraser, West Coast Hydroids, 1911, p. 34. 

 Clytia edwardsi Fraser, New England Hydroids, 1912, p. 44. 



Trophosome. — Stem unbranched or with few or many irregularly 

 placed branches; the stolon often forms a complicated network on 

 Fucus, wormtubes, etc., but at other times passes along in a fairly 

 regular direction. When the whole stem consists of a single pedicel, 

 it is long and slender, annulated at the base and below the hydrotheca; 

 when there is only one branch it turns abruptly in the direction of the 

 main stem, almost at its base; it is also long and slender, overreaching 

 the main stem, the branch often being as long as the main stem or even 

 longer. On it the annulations are similarly arranged to those on the 

 main stem; there are no annulations on the main stem immediately 

 above where the branch is given off. When other branches are given 

 off they bear a similar relation to the branch from which they spring 

 as the first branch does to the stem, thus producing a loose cymose 

 appearance. The whole colony may reach a height of 25 or 30 mm. 

 The hydrothecae are usually quite large but vary a large amount in 

 size, deeply campanulate in shape, with 10-14 deeply-cut, slender 

 teeth that are somewhat rounded at the tip. 



20 Hydroids of San Diego, 1904, p. 12. 



