PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM issued SMITHSONIAN INSTITUTION U. S. NATIONAL MUSEUM Vol. 86 Washington: 1938 No. 3044 POLYCLADS OF THE EAST COAST OF NORTH AMERICA ^ By A. S. Pearse Between June 1935 and May 1936, while I was investigating the flatworms known to the oystermen of Florida as "leeches," a number of species of these polyclads were found along the shores of the Gulf of Mexico. In attempting to identify these specimens, I examined turbellarians in the United States National Museum, and the present paper is the result. Twenty-seven species of the order Polycladida are now known from the east coast of North America from Texas to Baffin Bay. Eleven species and three genera are here described as new. Grateful acknowledgments are made to George W. Wharton, who prepared serial sections and made valuable suggestions; to Miss Eliza Taylor, for serial sections of Emtylochus; and to Prof. Horace W. Stunkard, who read the manuscript of this paper critically and sug-gested several improvements. Order POLYCLADIDA Suborder Acotylina: Section Craspedommata Family DISCOCELIDAE Genus DISCOCELIS Ehrenberg DISCOCELIS GRISEA, new species FlGUBE 22 A dozen specimens were collected from the Gulf of Mexico on No-vember 21, 1935, and one on February 10, 1936. When alive, an * Published with the permission of the United States Commissioner of Fisheries. 85371—38 1 gy
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