VOL. XXXVIII, No. 447 



MARCH, 1904 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 DEVOTED TO THE NATURAL SCIENCES 

 IN THEIR WIDEST SENSE 



CONTENTS 



L Breeding Habits of Crayfish PE0FES80B E. A. ANDEEW8 165 



n. Natural History of Hamineasolitaria Say . . • W. M. SMALLWOOD 2OT 



m. Notes and Literature: General Biology, Mendelism and Cytology, Inheri- 227 



tance of Acquired Mental Characters - Botany, Notes, The Journals 230 



IV. Correspondence 



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