VI. The Hydroids op the Pacific Coast of the United States, 

 SOUTH OF Vancouver Island. With a Report upon those 

 IN THE Museum of Yale College. Bv S. F. Clari 



Read Jan. 19. 18 T 6. 



The Museum is indebted for its collection of Californian Hydroids 

 chiefly to Pro!'. D. C. Eaton, who has presented during the last two or 

 three years, a large number of specimens, that were received by him 

 with dried algtt? from that coast. They were collected and sent to 

 him by Dr. C. W. Anderson, Santa Cruz, Cal. ; Dr. L. N. Dimmick, 

 Santa Barbara, Cal. ; Mi-s. Ell wood Cooper, Santa Barbara, Cal. ; 

 and ^Nliss jNIitchell of Vancouver Island. All the specimens received 

 from these sources were collected in tide-pools along the shore or 

 attached to algae, washed in froui deeper water. A few alcoholic 

 specimens have also been received from San Diego, Cal., collected on 

 the piles of the Avharves and along the shore, by Dr. E. Palmer, and 

 a fine specimen of Plumularia setacea was dredged in six to eight 

 fathoms, oil' San Diego, by Mr. Henry Hemphill. 



Some of the species, including most of the Sertnlarid(e, do not 

 seem to be injured by being dried, but others, as the Campannlaridce, 

 ai'e usually rendered useless for description. The specimens of the 

 two species of < ■ampanularia described below are unusually well 

 preserved, both hydrothecae and gonothecae being in good condition. 



There has been very little published on the hydroids of the 

 western coast of North America, up to tlie present time. In 1857 

 Dr. Trask* described and figured nine new species of Zoophytes 

 from the Bay of San Francisco and adjacent localities. Five of 

 these are Bryozoa ; the remaining four represent three genera of the 

 family Sertularidie, as follows: Sertularia anguind, S./ureata, Sertu- 

 lareUa turgida and HydvaUmania Franciscana, all of which, so far 

 as I am aware, are peculiar to that coast ; unless indeed the last 

 named species prove to be identical with H. falcata of Europe, 



* Proceedings of the California Academy of Natural Sciences, vol. i, March, 1357. 

 Dr. J. B. Trask. 

 Trans. Conn. Acad., Vol. III. 1 June, 1876. 



