COELENTERATA, ECHINODERMATA AND MOLLUSCA, 



CRUISES OF THE "EAGLE" AND "ARA," 1921-1928, 



WILLIAM K. VANDERBILT, COMMANDING. 



By Lee Boone. 



Introduction. 



The present Bulletin of the Vanderbilt Marine Museum, fourth in 

 the scientific series, contains three separate reports, on the Coelen- 

 terate, Echinoderm and Mollusk collections obtained by Mr. William 

 K. Vanderbilt, on a series of cruises conducted in his yachts, "Eagle" 

 and "Ara," during parts of the years 1921 to 1928, inclusive. 



Four distinctly separate faunal regions are involved in these ex- 

 plorations : (a) The West Indian region, from which the greater 

 percentage of species was obtained. Separate cruises during the years 

 1921, 1922, 1923, 1924 and 1925 were conducted by Mr. Vanderbilt in 

 this region. Additional material was obtained in the West Indies in 

 1926 and also in 1928, supplementing the Galapagan expeditions of 

 these years. 



(&) The Labrador-New England region is represented by material 

 collected in the waters of Newfoundland, Nova Scotia, eastern Canada, 

 the coast of Maine and of New York, including Long Island Sound, in 

 1921, 1922, 1924 and 1926. 



(c) The tropical American Pacific fauna is represented by explora- 

 tions in the Galapagos Islands, Cocos Island, the west coast of Costa 

 Rica and of Panama, including the Pearl Islands, also several deep-sea 

 stations in this region, during the expeditions of 1926 and 1928. 



(d) The Mediterranean fauna, with especial reference to the north 

 coasts of Morocco, deep-sea dredgings off the coasts of southern France, 

 off Sardinia and off Monaco, and explorations of the littoral fauna of 

 the Adriatic Sea. 



The bathymetric occurrence of the species taken in each of these 

 major regions ranges from littoral to true deep-sea forms, the deep-sea 

 stations ranging in depth from 100 fathoms to 900 fathoms. 



The annotated discussion of the collections is presented with refer- 

 ence to their systematic classification. A list of the species found in 

 each major faunal region is given also. 



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