VOL. XXXVIII, No. 454. OCTOBER, 1904 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 



DEVOTED TO THE NATURAL SCIENCES 

 IN THEIR WIDEST SENSE 



CONTENTS 



Page 



I. The Anatomy of the Coniferales (concluded) PKOF. D. P. PENHAILOW 691 



II. Studieiof the Plant Cell.- IV DE. B. M. DAVIS 728 



III- The Affinities of the Ophioglossacese and Marsiliacese PROF- D. H CAMPBELL 761 



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