No. 1. — Reports on the Results of Dredging, under the Supervision of Alexander Agassiz, on the East Coast of the United States, during the Summer of 1S80, by the U. S. Coast Survey Steamer "Blake" Commander J. E. Bartlett, U. S. N., Commanding. (Published by peiiuission of Carlile P. Patterson and J. E. Hilgakd, Supts. U. S. Coast and Geodetic Survey.) XVII. Report on the Crustacea. Part I. Decapoda. By Sidney I. Smith. The part of the following report relating to the Maci-ura was ready for the printer before Alphonse Milne-Edwards's Description de quelques Crustac'es Macroures provenant des grandes profondeurs de la Mer des Antilles (Annsdes Sci. Nat., Zool., 6°" serie, XL No. 4, 1881) was received, so that all the references to it have been added subsequently. The new species in this and some other recent papers of Milne-Edwai'ds, and in Bates's recent paper on the Penaeidea, are so inoperfectly characterized that in several cases I have found it impossible to determine, with any approximation to certainty, whether or not they are identical with species described in the following pages. I have endeavored, however, to make the descriptions and figures of the species here described so complete, that subsequent investigators will not labor under a similar difficulty in regard to them. BRACHYURA. MAIOIDEA. Amathia Agassizii, sp. nov. Plate II. Figs. 2, 3. Resembles A. Carpentcri Norman (figured by Wyville Thomson, Depths of the Sea, p. 175, 1873), but has shorter rostral horns and more numerous spines upon the carapax. The carapax Ip sub-triangular, excluding spines and rostral horns, nearly VOL. X. — NO. 1. 1
Report on the Crustacea. Part 1. Decapoda. Reports on the results of dredging, under the supervision of Alexander Agassiz, on the east coast of the United States, during the summer of 1880, by the U.S. Coast Survey Steamer Blake, Commander J.R. Bartlett, U.S.N., commanding
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