2 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



Professor and Mrs. G. E. MacGinitie of the Alaska Research Labora- 

 tory. To all of these the author is grateful for the opportunity to further 

 our knowledge of the distribution of the Bryozoa of the Eastern Pacific 

 area. 



History 



The Brj'ozoa of the Pacific coast of the Americas have received but 

 little attention in the past, except in a few limited areas. The first record 

 of species is that of Alcide d'Orbigny (Voyage I'Amerique Meridionale, 

 1841-7), who listed 14 species from the west coast of South America as 

 far north as the coast of Peru but, unfortunately, due to incomplete 

 descriptions and figures, some of his species cannot be determined posi- 

 tively. In 1856 Busk described and listed 15 species from Mazatlan, 

 Mexico, and in 1857 Trask recorded 5 species from the vicinity of San 

 Francisco. Fewkes in 1889 described Clavopora (Ascorhiza) occidentalis 

 from southern California. A few other scattering records appear in the 

 works of Busk, Hincks, Waters, etc. 



In the years 1882-4 the first important study of Pacific Bryozoa ap- 

 peared in Hincks' report on "Polyzoa of the Queen Charlotte Islands," 

 the material having been collected by Dr. G. W. Dawson of the Canadian 

 Geological Survey. In this report Hincks recorded about 95 species and 

 varieties from the waters of British Columbia, many of them new. 



Dr. Alice Robertson's important work began in 1899 with a short 

 paper on the Entoprocta of San Francisco Bay, and this was followed in 

 1900 by a list of 36 species taken by the Harriman Alaska Expedition, 

 but her greatest contribution was the series of three papers (1905, 1908 

 and 1910) on Bryozoa of the West Coast of North America. The area 

 covered was practically that of the west coast of the United States from 

 Puget Sound, Washington, to San Diego, California, though some more 

 northern forms were discussed, a total of 98 species. 



Dr. Chas. H. and Elsie O'Donoghue in 1923, "A preliminary list of 

 Bryozoa from the Vancouver Island Region," listed 170 species and 22 

 varieties. This was followed in 1926 by a "Second List," in which the 

 nomenclature was revised and 20 species added. 



In 1930 there appeared two papers dealing with limited tropical 

 areas. The first of these, "The Bryozoan Fauna of the Galapagos Islands," 

 by Canu and Bassler, recorded 56 species, many of them new, from three 

 dredge hauls made by the U. S. Str. "Albatross." The second, by Dr. 

 Anna B. Hastings, "Cheilostomatous Polyzoa from the vicinity of Pana- 



