NATURAL SCIENCE. 



A MONTHLY REVIEW OF SCIENTIFIC PROGRESS. 



A live Journal with independent Editorials, intelligible Articles, 

 Up-to-date News, and authoritative Reviews, on all that is taking 

 place in the world of Geology and the allied Sciences. 



" With the New Year NATURAL SCIENCE opens a new volume very brilliantly 

 and merits great success." — Yorkshire Weekly Fast. 



Among the chief Contents of the MAY nnmher are — 



NOTES AND COMMENTS.— The Bibliography of Zoology. A Palaaontologist on 



Zoological Systems. Sir "William Flower on the Principles of Nomenclature. 



The Publication of Papers by Societies, The Land and Water Areas of the 



Globe, &c. 

 ARTICLES.— Palasontology and the Biogenetic Law. Professor Karl von Zittel. 



Field Club Work in Ireland. Professor Grenville A. J. Cole, F.G. S. 



The Last of the " Challenger." George Murray. Some Definitions of 



Instinct. Professor C. Lloyd Morgan, F.G.S. The New Oban Cave. 



W. J. Lewis Abbott, F.G.S. Bibliographical Eeform and the " Zoological 



Record." Dr. H. H. Field. 

 REVIEWS of Nathorst's " Geology of Sweden " and other new books. 

 OBITUARIES of J. D. Dana, Toyokitsi Harada, Robert Fitch, and others. 

 NEWS, CORRESPONDENCE, &c. 



Price One Shilling Nett. Annual Subscription 14/- (3.50 Dols.), Post Free. 



NATURAL SCIENCE is now published by 



RAIT, HENDERSON & CO., LTD., 

 22, St. Andrew Street, Holborn Circus, London, E.C. 



4 Dols. per Year. 4.60 Dols. per Year (Foreign). 



AMERICAN NATURALIST 



A MONTHLY JOURNAL DEVOTED TO THE NATURAL 

 SCIENCES IN THEIR WIDEST SENSE. 



MANAGING EDITORS; 



Peofs. E. D. cope, Philadelphia, and J". S. KINGSLET, Boston, Mass. 



ASSOCIATE EDITORS : 

 Dr. C. O. whitman, Chicago. H. C. MEECER, Philadelphia. 



Prof. C. M. WEED, Durham, N.H. Prof. E. A ANDREWS, Baltimore. 



Dr. C. E. BESSEY, Lincoln, Neb. Prof. W. H. HOBBS, Madison, Wis. 



Prop. W. S. BAYLEY, Waterville, Maine, Dr. WM. EOMAINE NEWBOLD, Philadelphia. 



Published at Philadelphia, U.S.A. 

 THE EDWARDS & DOCKER CO., 



518 AND 520, MINOR STREET. 



