KEY TO THE TSOPODS OF THE PACIFIC COAST OF NORTH AMERICA, WITH DESCRIPTIONS OF TWENTY-TWO NEW SPECIES. By Harriet Richardson. The isopods of the Pacific coast of North America have claimed the attention of a number of naturalists during the last half of the nine-teenth century. Among the first to contribute to the knowledge of the fauna of that region was Dana. Stimpson also belongs to the earlier part of that period; his work on the Crustacea and Echinoder-mata of the Pacific shores of North America, published in 1857, was the first si)ecial treatise on the forms of that locality. In connection with the work of the later part of the past fifty years, the names of Stuxberg, Lockington, and Harford form one group as contempora-neous workers (1875-7(5), those of Schicedte and Meinert, and Budde-Lund, another group (1883-85), while the publications of Dr. Hansen and Dr. Benedict represent the latest (1898) work on the isopods of that coast. The number of species already described is 75, and '22 are added in the present work. These species represent 44 genera and IG families, as shown in the following table: LIST OF tribes, FAMILIES, (iENERA, AND SPECIES. Page. I. ClIELIKKRA 819 Family I. Tanaid;« 819 1. Tanais , 819 1. loricatus Spence 15iite i 819 2. alascensis, new species 819 II. Flahellifera. 820 Family II. Limnoriidje 821 2. Limnoria 821 3. lUjnorum (Rathke) 821 Family III. Cirolanidai 822 3. Cirolana .--. 822 4. harfordi (Lockington) 822 5. linguifrons, new species ... 823 4. Eurydice 824 6. caudata, new species 824 Family IV. Corallanida? 825 5. ('oralland 825 7. truncata, new species 825 Proceedings U. S. National Museum, Vol. XXI— No. 1 1 75. 815
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