VOL. XL, NO. 472 



APEIL, 1906 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 DEVOTED TO THE NATURAL SCIENCES 

 IN THEIR WIDEST SENSE 



.epoda ol Massachusetts .... A. S. PEAESE : 

 le PoUen Grain of Picea excelsa . DR. J. B. POLLOCK ! 

 [pUCryptobranchus a/legheniensis - PBOFESSOE A. M. EEESE ; 



BOSTON, U. S. A. 

 GINN & COMPANY, PUBLISHERS 

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