GEOLOGY. 



49 



Fig. 18. — Lower Jaw and Teeth of Plagiaulax Becclesii (twice natural size), Upper Oolite, 



Purbeck, Dorset. 



Fig. 19. — Lower Jaw and Teeth of Ampkitherium Prevostii (twice natural size), Great Oolite, 

 Stonesfield, Oxfordshire. 



(Natural Size.) 



Fig. 20.— Lower Jaw and Teeth of Phascolotherium Bucklandi, from the Great Oolite, 

 Stonesfield, Oxfordshire. 



