VOL. XXXVII, No. 439 



JULY. 1903 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 DEVOTED TO THE NATURAL SCIENCES 

 IN THEIR WIDEST SENSE 



CONTENTS 



I. The Colors of Northern Gamopetalous Flower. JOHN H. LOVELL 



n. Bib Variation in Cardium FBANK COLLINS BAKER 



m. The Perforation of a Vein by an Artery in the Cat (FEUS DOMES TIC A ) 



Dr. A. W. WEYSSE 



IV. A Peculiar Modification amongst Permian Dipnoans . Dr. C R. EASTMAN 



V. Notes and Literature: Zoology, Bailey's Birds of the Western United States, 



BOSTON. U. S. A. 



GINN & COMPANY, Publishers 



