VOL, XLU, HO. 501 



SEPTEMBER, 1908 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 DEVOTED TO THE NATURAL SCIENCES 

 IN THEIR WIDEST SENSE 



CONTENTS 



i 



I. Some Result! of the Florissant Expedition of 1908. Professor T. D. A. 



H. Embryology of Myosurus Minimus. DR. LEROY D. SWINGLE . . .888 



III. Another Aspect of the Species Question. DR. J. A. ALLEN . . .592 



IV. The Origin of Vertebrate Eyes. Professor G. H. PARKER , . . .601 



V. Notes and Literature : Heredity — Spurious Allelomorphism, Results of Some 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. T. 



NEW YORK : SUB-STATION 84 



