Clarke, S. F. 1894. The Hydroids. In: Report on the dredging operations off the west coast of Central America to the Galapagos, to the west coast of Mexico, and in the Gulf of California, in charge of Alexander Agassiz, carried out by the U.S. Fish Commission Steamer "Albatros", during 1891. Commander Z.L. Tanner, U.S.N., commanding. - Bulletin of the Museum of comparative Zoölogy of Harvard College 25: 71-77, pls 1-5.
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Clarke, S. F.
1894
The Hydroids. In: Report on the dredging operations off the west coast of Central America to the Galapagos, to the west coast of Mexico, and in the Gulf of California, in charge of Alexander Agassiz, carried out by the U.S. Fish Commission Steamer "Albatros
U.S.N., commanding. - Bulletin of the Museum of comparative Zoölogy of Harvard College