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ADVERTISEMENT.

The extension of the scope of the National Museum during the past few years, and the activity of the collectors employed in its interest, have caused a great increase in the amount of material in its possession. Many of the objects gathered are of a novel and important character, and serve to throw a new light upon the study of nature and of man.

The importance to science of prompt publication of descriptions of this material led to the establishment, in 1878, of the present series of publications, entitled "Proceedings of the United States National Museum," the distinguishing peculiarity of which is that the articles are published in pamphlet form as fast as completed and in advance of the bound volume. The present volume constitutes the fourteenth of the series.

The articles in this series consist: First, of papers prepared by the scientific corps of the National Museum; secondly, of papers by others, founded upon the collections in the National Museum; and, finally, of facts and memoranda from the correspondence of the Smithsonian Institution.

The Bulletin of the National Museum, the publication of which was commenced in 1875, consists of elaborate papers based upon the collec tions of the Museum, reports of expeditions, etc., while the Proceedings facilitate the prompt publication of freshly-acquired facts relating to biology, anthropology and geology, descriptions of restricted groups of animals and plants, the discussion of particular questions relative to the synonymy of species; and the diaries of minor expeditions.

Other papers, of more general popular interest, are printed in the Appendix to the Annual Report.

Papers intended for publication in the Proceedings and Bulletin of the National Museum are referred to the Advisory Committee on Publications, composed as follows: T. H. Bean (chairman), A. Howard Clark, R. E. Earll, Otis T. Mason, Leonhard Stejneger, Frederick W. True, and Lester F. Ward.

S. P. LANGLEY, Secretary of the Smithsonian Institution.

II

TABLE OF CONTENTS.

Page

Bean, Barton A. Fishes collected by William P. Seal, in Chesapeake Bay, at Cape
Charles City, Virginia, September 16 to October 3, 1890.......
Benedict, James E. and Rathbun, Mary J. The Genus Panopeus. (Plates XIX-
XXV)..

83-94

355-385

Panopeus areolatus, Panopeus dissimilis, Panopeus ovatus, Panopeus angustifrons, Pano-
peus hemphillii, Panopeus bermudensis, new species.

Lophotriccus zeledoni, Pachyrhamphus ornatus, Deconychura typica, Vireo superciliaris,
Basileuterus salvini, Grallaria lizanoi, Myrmeciza intermedia, new species. Lophotric-
cus squamicristatus minor, new subspecies.

121-165

Evermann, Barton W., and Jenkins, Oliver P. Report upon a collection of fishes,
made at Guaymas, Sonora, Mexico, with descriptions of new species. (Plates I–II) Rhinop-
tera steindachneri, Menidia clara, Upeneus rathbuni, new species.
Gilbert, Charles H. (Scientific results of explorations by the U. S. Fish Commission
steamer Albatross.) No. XXI.-Descriptions of apodal fishes from the tropical Pacific...... 317-352
Xenomystax, Ilyophis, new genera.

Chlopsis equatorialis, Xenomystax atrarius, Ophisoma prorigerum, Ophisoma macrurum,
Ilyophis brunneus, new species.

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