TAB. XVI. 

 Ophidta. 



Fig. 



1. Left side view of a ehain of thirty trunk vertebrae of the Palceophis toliapicus, 



from Sheppy. 



2. Right side view of the same vertebrae. 



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



of the ribs. 



4. Portion of a group of Palteophis vertebrae from Bracklesham, showing the size 



and structure of the ribs ; natural size 



