TAB. XV. 



Ophidia. — Palceophis toliapicus ; nat size. 



Fig. 



1. A group of vertebrae, some of which show the long neural spine entire. 



2. A group of vertebrae and ribs. 



3. Five vertebrae in natural articulation with the diapophysis well preserved. 



4. Under surface of four partially dislocated vertebrae. 



5. Side view of the same vertebrae ; natural size. 



