CONTENTS . 1 
INTRODUCTORY LETTER. 
BY A. L. HEERMANN, M. D. 
No. 1. 
REPORT UPON REPTILES OF THE ROUTE. 
BY EDWARD HALLOWELL, M. D. 
No. 2. 
REPORT UPON BIRDS OF THE ROUTE. 
BY A. L. HEERMANN, M. D. 
No. 3. 
REPORT UPON MAMMALS OF THE ROUTE. 
BY S. F. BAIRD. 
No. 4. 
REPORT UPON FISHES OF THE ROUTE. 
BY CHARLES GIRARD, M. D. 
1 The report to which the present part belongs will be found in volume V. 
