THE. TWENTIETH YEAR ! 
THE AMERICAN NATURALIST; 
A Popular Illustrated Magazine of N atural History and Travel. 
ANNOUNCEMENT FOR i8S6. ' VOLUME XX. 
This journal of popular Natural Science is published by Messrs. McCalla & 
Stayely, Philadelphia. Pa., under the editorial management of Dr. A. S. Pack- 
ard, and Prof. E D. CoPE, with the assistance of eminent men of science. The 
typographical dress and illustrations which have heretofore given character to this 
magazine will be sustained, and it will be of a thoroughly popular nature, so as to 
interest the general reader as well as the young naturalist. It will continue to be 
a journal of science-education and for the use of science- teachers 
The eighteenth and nineteenth volumes were double the size of the earlier 
volumes ; and for variety, interest and freshness of scientific news, it is claimed 
that the N^atu racist is without a rival. 
Each number of the Naturalist contains carefully written original articles 
on various scientific subjects, and, in addition, twelve departments — Recent Litera- 
ture, Geography and Travels, Geology and Paleontology. Mineralogy , Botany, Ento- 
mology, Zoology, Embryology, Physiology, Psychology, Anthropology , and Microscopy . 
The department of Botany is edited by Prof. C. E. Bessy, that of Microscopy is 
edited by Prof. C. O Wi-iitman, that of Mineralogy is edited by Dr Geo. H. 
Williams, and that of Physiology by Prof. Henry Sewell, while the depart- 
ment of Geography and Travels is edited by W. N. LocKiNGTON. Prof. Otis T. 
Mason will continue his monthly summaries of Anthropological News, and will 
edit the department of Anthropology We added this year a department of Em- 
bryology, under one ol our ablest investigators, Mr. Jno. A Ryder, of the Smith- 
sonian Institution. Arrangements have been made to report the Proceedings of 
Scientific Societies with promptness. Particular attention will be given to micro- 
scopical and historical discoveries, methods of microscopical research, new instru- 
ments, methods of cutting and staining sections, etc. The series of illustrated 
monographs on North American fossil vertebrates, by Prof- Cope, witl be continued. 
The attention of publishers and teachers is called to the critical notices of 
standard scientific books, to which especial attention has been given the past year, 
and will be given during the ensuing year. 
Original articles or notices by over one hundred of our leading naturalists have 
appeared in the volumes for i88i, 1882, 1S83, 1884 and 1885, among whom are 
the following: — 
Dr. C. C. Abbott, 
Prof. J. C. Arthur, 
Mr. E. A. Barber, 
Prof. W. J. Beal, 
Prof. W. K. Brooks, 
Mr. Edward Burgess, 
Hon. J. D. Caton, 
Dr. Elliott Cones, 
Dr. W. H. Dali, 
Prof. Walter Faxon, 
Prof. S. A. Forbes, 
Mr. J. W. Fewkes, 
Prof. Archibald Geikie, 
Mr. Henry Gillman, 
Dr. Carl F. Gissler, 
Mr. Edward Lee Greene, 
Prof. F. V. Hayden, 
Subscription Price, 
Rev. E. J. Hill, 
Mr. E W. Claypole, 
Prof. T. Sterry'Hunt, 
Prof. A. Hyatt, 
Ernest Ingersoll, 
Prof. 1 ). S Jordan, 
Mr. J. S. Kingsley, 
Prof. Samuel Lockwood, 
Prof. Leo Lesquereux, 
Prof. G. Macloskie, 
Dr. C. Hart Merriam, 
Mr. Charles Morris, 
Rev. Henry C. McCook. 
Prof. C. Sedgwick Minot 
Prof E. S. Morse, 
Prof. A N Prentiss, 
Dr. D. W. Prentiss, 
Mr. Richard Rathbun, 
Dr. Charles Ran, 
Mr. J. A. Ryder. 
Dr. R. W. Shufeldt, 
Dr. T. H. Streets. 
Prof S. I. Smith, 
Prof. V. M. Spalding, 
J. F. Whiteaves, 
Prof. F. H. Snow, 
Dr. R. E. C. Stearns, 
Prof. Cyrus Thomas, 
Mrs. Mary Treat, 
Mr. Wm. Trelease, 
Dr. M. PT Wadsworth, 
Dr. R. H. Ward, 
Prof. C. A. White, 
Prof. R. Ramsay Wright. 
00 Per Annum, in Advance. 
Px-emittances by mail should be sent by 'a money-order, draft on Philadelphia 
or New York, or registered letter, to M'SCALLA Bs 
237«9 Sook StKst, PMladdpkia, Pa. 
