250 S. M Clarh — Hydroids of the Pacific Coast. 



Africa and New England. In 1860 Andrew Murray* described and 

 figured five species from the Californian coast, of which three are 

 new, and the other two, Sertidaria labrata and Plumalaria gracilis^ 

 are synonymous with two of Trask's species, viz : Sertularia anguina 

 and Plumularia Franciscana. Mr. Alexander Agassizf in 1865 

 described seven species and recorded seven others from the Bay of 

 San Francisco ; and he had three of the same from the Gulf of Georgia, 

 W. T. Five species were also mentioned by him from the North 

 Pacific. Two of these five northern species, Bougainvillia Mertensii 

 Ag. and Cotidina Greenei A. Ag., are also found at San Francisco. 

 The latter species having also been collected at Santa Barbara, 

 Cal., has the wide j-ange of nearly three thousand miles upon our 

 western coast. Professor Allman mentions having found sixteen 

 species in a collection from the Californian coast, siil)mitted to him 

 for examination ; two of them, Lafoea. dumosa and Sertularia pumila, 

 are common on the European and New England coasts, and the former 

 species is also recorded from South Africa. The collection in the 

 Museum of Yale College contains twelve species and one variety. Of 

 these four are new ; nine are recorded only from the Pacific coast of 

 North America, as yet; and three, Halecium. tenellum^ ISertularia 

 argentea and Phmiidaria setacea, are also common on the European 

 shores; the first two of these have also been found on the New England 

 coast, from Maine to Long Island Sound. The most common form on 

 the Californian coast is the showy Aglaophenia struthionides, which is 

 apparently as abundant there as Sertularia argentea and S. pumila are 

 upon our eastern shores, for it forms the bulk of every package sent 

 to lis from the western coast. The folloAving table gives a list of all 

 the Hydroids known on the western coast of the United States, from 

 Vancouver's Island to San Diego, with the range of tlie different 

 species and the names of some of the collectors. 



List of Hydroida known to occur between San Diego and Vancouver 



Island. 



Coryne rosaria A. Ag. Bay of San Francisco, Cal. (A. Agassiz). 



Tubularia elegans Clark. San Diego, Cal. (Dr. 15. Palmer). 



Thamnocnidia tubiilaroides A. Ag. Bay of San Francisco, Cal. (A. Agassiz). 



* Tlie Annals and Magazine of Natural History, Series 3, No. XXVIII, April, 1860. 

 Descriptions of new species of Hydroids from the Californian Coast. By Andrew 

 Murray. 



\ Illustrated Catalogue of the Museum of Comparative Zoology. No. II. North 

 American Acalephre. By Alexander Agassiz. 1805.^ 



