30 REPORT ON NATIONAL MUSEUM, 1886. 



soman. Institution in 1869. More attention is given in the present work 

 to the subjects of geographical distribution, organs of generation, lin- 

 gual dentition, and classification; and species are grouped geograph- 

 ically. 



Bulletin 20. "Results of Ornithological Explorations in 

 the Commander Islands and in Kamtschatka," by Leonhard 

 Stejueger; 8 vo., p. 382; 8 colored plates and map. 



This work is the result of the author's explorations in the Commander 

 Islands and iu Kamtschatka, and contains the conclusions at which he 

 has arrived after careful examination of the avifauna of that region, his 

 investigations being based both upon material observed and collected 

 by himself, and also upon specimens in the collection of the National 

 Museum. This bulletin consists of three sections: (1) A review of the 

 species of birds collected or observed by the author at the Commander 

 Islands, and at Petropaulski, Kamtschatka ; (2) a synopsis of the birds 

 reported to inhabit Kamtschatka; and (3) conclusions. 



The first section, which occupies the larger portion of the work, con- 

 tains one hundred and forty descriptions and numerous tables. Be- 

 sides technical descriptions there are references to the habits of the birds, 

 and a few illustrations. 



The second section, a synopsis of the birds reported to inhabit Kamts- 

 chatka, contains a list of one hundred and eighty-six species, an at- 

 tempt being made to enumerate all the species which have been recorded 

 from that place. A few names of species accredited to Kamtschatka 

 without any reliable authority for the statements, are also included. 



The chief sources from which knowledge of the Kamtschatkan ornis 

 is derived, are the explorations of Steller, Vossnessenski, von Kittlitz, 

 and Dybowski ; and the author has based some of his statements upon 

 their writings, as well as upon his own explorations. There is an ap- 

 pendix to this section, incorporating information from " Listedes Oiseaux 

 du Kamtschatka et des iles Commandeurs par le Dr. B. Dybowski et L. 

 Taczanowski," with comments by the author. 



The third part — conclusions — is based upon the two preceding sec- 

 tions of the work. The relations of the avifauna of the peninsula to 

 that of the islands are briefly discussed, and are exhibited chiefly in the 

 form of tables giving the circumpolar, palsearctic, Pacific, American, 

 Siberian, East Asiatic, and other forms. The residents and migrauts 

 are described at some length, and are catalogued in tables. 



Bulletin 30. Bibliography of Publications relating to the 

 Collection of Fossil Invertebrates in the United States 

 National Museum, including complete lists of the writings 

 of Fielding B. Meek, Charles A. White, and Charles D. Wal- 

 COTT, by John Belknap Marcou, 8vo., pp. 333. 



This Bulletin is third in the series of "Bibliographies of American 

 Naturalists," and consists of four parts : I, A biographical sketch and 

 list of the published writings of Fielding B. Meek ; n, Published writ- 



