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' OF THE 



IsfEW YORK ACADEMY OF SCIENCES. 

 A VOLUME IV., 1886-9. 



The " Annals," published for over half a century by the Lyceum of 

 Natural History, are continued under the above name by the Nevr York 

 Academy of Sciences, beginning in 1877. Three volumes of the new- 

 series have now been issued, each covermg three years (1877-9, 1880-2, 

 1883-5 inclusive). 



With the beginning of the fourth volume, the Academy decided to 

 change somewhat, the mode of publication. The Annals will hence- 

 forth be issued without particular reference to times or periods. The 

 parts will appear as material for them shall be offered; each single part, 

 or number, as before, will contain at least 32 pages, with or without 

 plates; twelve numbers, as before, whenever published, will constitute 

 a volume. The size and general character of the parts and volumes will 

 not be changed; nor is it intended at all to reduce the average yearly 

 amount of matter. 



The Annals will include the more extended and elaborate papers read 

 before the Academy. They will maintain the high standard which has 

 made them, for many years past, one of the prominent scientific publi- 

 cations of the world, and has carried the name of the society literally into 

 every land. The briefer papers and discussions that form part of the 

 Academy's meetings, will appear in its other publication, the Trans- 

 actions, which it is designed to issue promptly and regularly, so as to 

 give a record of the current work of each year, — the single numbers ap- 

 pearing monthly (or double, bi-monthly), and eight single numbers 

 forming an annual volume. 



By vote of the Academy, both these publications will be sent free to 

 its Resident and Honorary members. 



To all others, prices will be as follows: 



Annals, single numbers, One Dollar. 



" double or triple numbers, in proportion, 



" per volume (12 numbers), . . . Ten Dollars. 



Transactions, per year, Three Dollars. 



" single numbers, .... Fifty Cents. 



All communications should be addressed tc 



Prof. D. S. MARTIN, 

 Qhaifman Publication Committee, No. 236 West Ath Street, 



New York. 

 Or to 

 HENRY DUDLEY, Esq., 



Treasurer, No. 56 West bith Street. 



The Academy has for sale a number of back volumes of the Annals, 

 of both series, each containing twelve or more numbers; the price per 

 volume is Five Dollars. 



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