CONTENTS 



Editorial Notes . . . . .221 



XIV. A Skull of Bison * Crassicornis. By W. J. 



Holland. . . . . . .225 



XV. The Serrasalminae and Mylinae. By C. H. 



ElGENMANN . . . . . .2 26 



XVI. Heads and Tails; A Few Notes Relating to the 

 Structure of the Sauropod Dinosaurs. By 

 W. J. Holland. ..... 273 



XVII. Dipterus Remains from the Upper Devonian of 



Colorado. By C. R. Ivasimax. . . . 279 

 XVIII. Notes on Tropical American Tettigonoidea 



(Locustodea). By Lawrence Bkuner. . 284 



Index 405 



