PAGE 



109. Skull and jaws of Bathyopsoides harrisorum 376 



110. Teeth of Bathyopsoides harrisorum 376 



111. Parts of skeleton of Elasmosaurus serpentinus 387 



112. Excavation near Alzada, Montana, exposing Elasmosaurus serpentinus 



and gastroliths 388 



113. Gastroliths found associated with Elasmosaurus serpentinus 389 



114. Molar dentition of Nanodelphys minutus 395 



