PRESIDENT'S ADDRESS. 27 



the teeth solid ; harmless. 2. Opisthoglypha, one or more of the 

 posterior maxillary teeth grooved, probably not altogether 

 innocuous. 3. Proteroglypha, anterior maxillary teeth grooved ; 

 poisonous. The only British Snakes, Tropidonotus natrix (the 

 Ringed Snake) and Coronella Iccvis (The Smooth Snake) and the 

 Common Black Snake, of North America, Coryophodon constrictor, 

 belong to the section Aglypha. The only British fossil Snakes 

 which have been hitherto found are Palceophis toliapicus and 

 P. Typhous from the Eocene of Sheppy and Bracklesham and 

 Paleryx (Pal&opython) depressus and P. rhombifer from the 

 Oligocene, Hordwell, Hants. 



