﻿DEFINITION AND CLASSIFICATION 7 



oldest snake remains, Helagras, Cope, are stated to 

 approach the Lacertilian type. 



Whether the vertebrae named Syrnoliophis^ 

 Sauvage, from the chalk of France, and Coniophis, 

 Marsh, from the Laramie Cretaceous of North 

 America, are Ophidian, as claimed by their descri- 

 bers, or Dolichosaurian, cannot be decided without 

 further material. 



