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BIOLOGY AND ZOOLOGY. 



MATERIALS FOR THE STUDY OF VARIATION. Treated with 

 especial regard to Discontinuity in the Origin of Species. By William Bateson, 

 M.A., Fellow of St. John's College, Cambridge. Svo. 21s. net. 



AMFHIOXUS AND THE ANCESTRY OF THE VERTEBRATES. 

 By Arthur Willey, B.Sc, Tutor in Biology, Columbia College ; Balfour Student 

 of tlie University of Cambridge. With a preface by Henry Fairfield Oseorn. 

 Svo. 10s. Gd. net. 



THE MYOLOGY OF THE RAVEN {Conms corax Sinuatus). A Guide 

 to the Study of the Muscular System in Birds. By R. W. Shufeldt, (^f tlie 

 Smithsonian Institute, Washington, U.S.A. With Illustrations. Svo. 13s. net. 



ORGANIC EVOLUTION AS THE RESULT OF THE INHERITANCE 

 OP ACQUIRED CHARACTERS ACCORDING TO THE LAWS OF ORGANIC 

 GROWTH. By Dr. G. 11. Theodor Eimer, Professor of Zoology and Comparative 

 Anatomy in Tubingen. Translated by J. T. Cunningham, M.A., F.R.S.E., late 

 Fellov^ of University College, O.xford. Svo. 12s. 6d. 



FROM THE GREEKS TO DARWIN. An Outline of tlie Development 

 of the Evolution Idea. By Henry Fairfield Osborn, Sc.D., Da Costa Professor 

 of Biology in Columbia College, Curator in tlie American Museum of Natural 

 History. Svo. 9s. net. 



LESSONS IN ELEMENTARY BIOLOGY. By T. Jeffrey Parke};, 

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 Illustrated. Second Edition. Crown Svo. 10s. 6d. 



KEY TO NORTH AMERICAN BIRDS. Containing a concise account 

 of every species of living and fossil bird at present known from the continent 

 north of the Mexican and United States boundary, inclusive of Greenland. 

 Second Edition, with which are incorporated General Ornithology — an outline of 

 the structure and classification of birds, and Field Ornitliology— a manual of 

 collecting, preparing and preserving birds. By Elliott Coues, M.A., M.D., 

 Ph.D., Member of the National Academy of Sciences. Profusely illustrated. 

 Super Royal Svo. 42s. 



MONOGRAPH OF THE BRITISH CICADA OR TETTIGIID^ 



(Froghoppers and Grassflies). By George Bowdler Bdckton, F.R.S., Corr. 

 Memb. Acad. Nat. Hist, of Philadelphia, Memb. de la Sue. Ent. de France. 

 Illustrated by more than 400 Coloured Drawings. Two Vols. Demy Svo. 33s. 6d. 

 each net. Also in Eight Parts. 8s. each net. 



THE FOSSIL INSECTS OF NORTH AMERICA. With Notes on 

 some European Species. By Samuel H. Scudder. Vul. I. The Pretertiary 

 Insects. With 34 Plates. Vol. II. The Tertiary Insects. With a Map and 28 

 Plates. 4to. Paper Boards. 90s. net. 



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