VOL. XXXVIII, No. 



May, 1904 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 DEVOTED TO THE NATURAL SCIENCES 

 IN THEIR WIDEST SENSE 



CONTENTS 



I. Tlie Anatomy of the North American Coniferaies together with Certain Exotic 



Species icontinued.) PKOFESSOE D. P- PENHALLOW 331 



n. Further Instances of Malar Division . . • DB. AlElfe HEDLI6KA 361 



nr. Studies on the Plant CeU— I . • • ■ . DR. BKADLEY MOOEE DAVIS 867 



IV. Notes and Literature: Gensral Biology, Plankton of the Illinos River. Where 397 



did Life Begin.' Bermuda, Morgan on Evolution and Adaptation — 



Zoology, Zoi31ogical Investigations in the Malay Archipelago, Davison';- 399 



V. Corraspondence .405 



BOSTON, U. S. A. 



GINN & COMPANY, PUBLISHERS 



