VOL. XI, NO. 477 



SEPIEMBEE. 190« 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURITAL 

 DEVOTED TO THE NATURAL SCIENCES 

 IN THEIR WIDEST SENSE 



CONTENTS 



I. Hiatogenesii oftheBetina PEOFESSOK A. W, WEYSSE AND W. S. BURGESS 611 

 II. Notes on Marine Copepoda of Rhode Island . . . . L. W. WILLIAMS 639 

 m. Lichens of Mount Monadnock, New Hampshire . B. H. HOWE, JR. 661 



IV. Notes and Literature : Botany .667 



V. Publications Received 677 



BOSTON, IT. S. A. 

 GINN & COMPANY, PUBLISHERS 

 29 BEACON STREET 



