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VOL. XXXVII, No. 444 



December. 1903 



THE 

 AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 DEVOTED TO THE NATURAL SCIENCES 

 IN THEIR WIDEST SENSE 



CONTENTS 



I. Adaptations to Aquatic, Arboreal, Fossorial and Cursorial Habits in Mam- 



mals. III. Fossorial Adaptation. H. W- SHIMES 819 



H. On the Structure of the Pteraspidae and Cephalaspidae 



PROFESSOR W. PATTEN 827 

 in- An Out-Door Equipment for College Work in Biology 



PROFESSOR J. G. NEEDHAM 867 

 IV. Preliminary Report on the "Palolo" Worm of Samoa, Eunice viridis (Gray) 



W. McM. WOODWORTH 875 



V. Further Notes on the Habits of Autodax lugubris 



PROFESSOR W. E. HITTER 883 



VI. A Trip to the Truchas Peak,, New Mexico WILMATTE P. COCKEREL! 887 



VII. Quarterly Record of Gifts, Appointments, Retirements and Deaths 



BOSTON, U. S. A. 



GINN & COMPANY, Publishers 



