TABLE OF CONTENTS. 
PREFATORY NoTE 
List or Fiaures 1n TExt 
List oF PLATES : : A 
MeEmorr I. Osteology of Haplocanthosaurus. J. B. Hatcher 
Memorr II. Osteology of Baptanodon Marsh. C. W. Gilmore 
Memorr III. Fossil Avian Remains from Armissan. C. R. Eastman 
Memorr’ IV. Description of New Rodents. O. A. Peterson 
Memorr VV. The Tertiary of Montana. Earl Douglass ‘ 
- Memorr VI. The Osteology of Diplodocus Marsh. W. J. Holland 
Memorr VII. The Osteology of Protostega. G. R. Wieland . 
Memoir VIII. New Suilline Remains from the Miocene of Nebraska. O. A. 
Peterson 
Memoir IX. Notes on the Osteology of Baptanodon. C. W. Gilmore . 
Memorr  X. The Crawfishes of the State of Pennsylvania. Dr. Arnold E. 
Ortmann 
Index 
