[fraser] HYDROIDS OF THE VANCOUVER ISLAND REGION 123 



Eudendrium rameum Torrey, Hyd. of the Pacific Coast, 1902, p. 33. 

 Eudendrium rameum Fraser, West Coast Hydroids, 1911, p. 25. 



Trophosome. — Stem large, fascicled, much and irregularly branch- 

 ed, large branches may also be fascicled, small branches give rise to the 

 pedicels for the hydranths, these usually passing out from the distal 

 side of the branches; hydranths with 24-25 tentacles; perisarc on 

 main stem and on large branches smooth or at most wavy, small 

 branches with a few rings or wrinkles at the base, pedicels annulated 

 throughout. 



Gonosome. — Female gonophores oval, borne in a cluster from the 

 hydranth body below the base of the tentacles. Male gonophores 

 similarly placed forming a whorl, 2-3 chambered. 



Color. — Perisarc dark-brown, hydranths reddish, female gono- 

 phores yellow. 



Distribution. — Swiftsure Shoal, off Matia I., off Waldron I., 

 Friday Harbor. 



I have not obtained any male gonophores. The description and 

 the figure are from Jâderholm. 



Eudendrium tenellum Allman 



PI. VI, Fig. 16 



Eudendrium tenellum Allman, Gulf Stream Hydroids, 1877, p. 8. 

 Eudendrium tenellum Bonne vie, Neue Norvegische Hydroiden, 



1898, p. 7. 

 Eudendrium tenellum Jâderholm, Northern and Arctic Invert, 1909, 



p. 54. 



Trophosome. — Colony very small, seldom reaching 1 cm. in height, 

 slender, growing from a stolon which forms a loose network over 

 worm tubes, etc. ; stem unbranched or with one or more branches 

 irregularly arranged and forming a wide angle with the stem; hy- 

 dranth with about 20 tentacles; perisarc smooth for the most part, 

 usually 2 or 3 annulations at the base of the stem and branches and 

 often 2 or 3 together along the stem or branch, apparently at no 

 definite distance from the base. 



Gonosome. — Gonophores arranged around the base of the hydranth 

 body, the female oval, the male two-chambered, the chambers nearly 

 globular; the gonophores may spring from the stolon or from the 

 branches. 



Color. — Perisarc light horn color, hydranths flesh color. 



Distribution. — Near Clarke Rock, north of Gabriola I., Northum- 

 berland Channel. 



