ALL RIQHTS RESERVED. 



Vol. IV. No. 28 



Ratui^al 



"'^" SeiERGE: 



Jl JVEonthly. I^evieW of Scientific Ppogress. 



JUNE, 1894. 



CONTENTS. 



PAGE 



Notes and Comments 401 



Composite Generic Fundamenta— Organic Equilibrium -Induced 

 Variation — The Ways of the White Ant — British and Foreign 

 Botany — Death Valley — Hatching of Octopus — Nerves of 

 Molluscs— Nullipores — International Catalogues of Scientific 

 Publications — Records of Scientific Literature — Boulders as 

 Sources of Error— Sutherland Gold-fields. 



I. Cell-Division. Part II. (Illustrated.) By M. D. Hill 417 



II. Can the Sexes in Ammonites be Distinguished ? By S. S. Buck- 

 man, F.G.S., and F. A. Bather, M. A 427 



III. The Palaearctic and Nearctic Regions compared as regards the 



Families and Genera of their Mammalia and Birds. By 



Dr. Alfred Russel Wallace, F.R.S 433 



IV. Some Current Problems in Experimental Psychology. By 



Professor E. B. Titchener 446 



V. Notes on Oround-Ice. By R. D. Oldham, F.G.S 450 



VI. The Significance of the Bird's Foot. By Frank Finn, M.A., F.Z.S. 453 



Some New Books 457 



The Genus Salpa. (Illustrated.) By W^. K. Brooks.— Biology of 

 Ferns. By G. F. Atkinson.— Structural Botany. By D. H. 

 Scott.— Manuel de Geographie botanique. By Oscar Drude. 

 Monograph of Lichens of Great Britain. By Rev. J. M. 

 Ci^ombiek— Bird Life in Arctic Norway. By Robert Collett. 



News of Universities*. Museums, and Societies 469 



Correspondence :— T. Mellard^Reade.— Wm. Taylor 472 



London and New York: MACMILLAN & CO. 



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