TAB. XVI. 

 Ophidia. 



Fig. 



1. Left side view of a chain of thirty trunk vertebrae of the PalcsopJiis toliapicus, 



from Sheppy. 



2. Right side view of the same vertebrae. 



3. Under view of five vertebrae of the same chain, with the articular ends of some of 



of the ribs. 



4. Portion of a group of Paleeophis vertebras from Bracklesham, showing the size 



and structure of the ribs ; natural size 



