[fraser] HYDROIDS OF THE VANCOUVER ISLAND REGION 113 



Gonosome. — Sporosacs developed from the body of the hydranth 

 among, or just proximal to, the tentacles. 



Coryne crassa new species 

 PI. II, Fig. 3 



Trophosome. — Colony slightly and irregularly branched, branches 

 reaching to a height of 15 mm. The branches come from the stem 

 at a wide angle and are constricted at the base; stem and branches 

 practically the same size throughout; perisarc thick with but few 

 annulations. Hydranths large with from 20 to 25 rather short 

 tentacles, scattered without any very definite arrangement in rows. 

 The most distal tentacles are farther from the extremity of the pro- 

 boscis than is usual in this genus. 



Gonosome. — Several sporosacs, as many as 8 or 10, are developed 

 from the body just below or just above the proximal tentacles. Fe- 

 male sporosacs large with few large ova, male not so large as the 

 female but still of good size. Very often the majority of the sporosacs 

 develop on the one side of the hydranth and give it a distorted 

 appearance. 



Color. — Stem and branches horn color, sporosacs flesh color 

 as are also the hydranths but these are fainter, spadix of thin blood 

 color or in some cases pink. 



Distribution. — Friday Harbor. 



In general appearance this species resembles Syncoryne mirabilis 

 very much but it is stouter and has larger hydranths than that species. 

 It is quite unlike Coryne brachiata, the only other Coryne recorded 

 from the west coast, as that species is very strongly annulated, has 

 much smaller sporosacs and more numerous ova. 



Family Syncorynidae 



Trophosome. — Hydranths club-shaped with numerous scattered 

 capitate tentacles. 



Gonosome. — Gonophores, borne on the body of the hydranth, 

 give rise to free medusa; with four radial canals and lour marginal 

 tentacles, some or all of which may be rudimentary. 



Genus SYNCORYNE 



Trophosome. — Colony unbranched or slightly branched, perisarc 

 well developed, tentacles strongly capitate. 



Gonosome. — Gonophores usually few in number; medusae with 

 four rudimentary tentacles. 



