Vol. XXXVII, No. 441 September. 1903 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 DEVOTED TO THE NATURAL SCIENCES 

 IN THEIR WIDEST SENSE 



CONTENTS 



Page 



I. A Contribution to the Morphology and Development of Corymorpha pen- 



dula Ag ALBERT J. MAY 579 



H. The Habits of Camoarus J. ARTHUR HARRIS 601 



in. Synopses of North American Invertebrates. XIX. The Trichodectidae. 



MAX MORSE 609 



IV. Notes and Literature: General Biology, Vernon's Variation —Physiology, 626 



Mind in Nature, The Biogen Hypothesis — Zoology, Animal Classirica- 

 Adherents, Notes — Botany, Setchell and Gardner's N. W. Algae, Notes. 634 



GINN & COMPANY, PUBLISHERS 



