TAB. IV. ^ ■ 
Plesiosaunis dolichodeirMs, nat. size. 
Fig. 
1. Dorsal vertebra, side view. 
2. Ib,, back view. 
3. Tenth caudal vertebra, side view. 
4. Ib., under view of centrum. 
5. Ib., back view. 
6. Twelfth caudal vertebra, side view. 
7. Ib., under view of centrum. 
8. Ib., back view. 
9. Thirtieth caudal vertebra, back view. 
From the Lower Lias of Charmouth. In the British Museum. 
