The Brachyura and Macrura of Porto Rico, by Mary J. Rathbun The Anomuran Collections, by James E. Benedict The Stomatopoda of Porto Rico, by Robert Payne Bigeltm The Porto Rican Isopoda, by H. F. Moore The Cirripedia collected near Porto Rico, by Maurice A. Bigelow The Polychzetous Annelids of Porto Rico, by A. L. Tread ell Description of two new Leeches from Porto Rico, by J. Percy Moore The Nemerteans of Porto Rico, by Wesley R. Coe The Echinoderms of Porto Rico, by Hubert Lyman Clark The Alcyonaria of Porto Rico, by Charles W. Hargitt and Charles G. Rogers The Stony Corals of the Porto Rican Waters, by T. Wayland Vaughan The Actinians of Porto Rico, by J. E. Duerden The Sponges collected in Porto Rico in 1899, by H. V. Wilson.

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