198 



THE BATH OOLITE PERIOD. 



CHAP. 



each containing the maxillary and intermaxillary bones, tlie finest 

 and most instructive contributed by Mr. Abbay. The shaded part 

 of the drawing represents this specimen, with several prominent 

 and deeply-rooted curved, compressed, and crenulated teeth in 

 different stages of growth. The length of this maxilla is 17*75 

 inches; the greatest depth, from what is probably the lateral 

 edge of the nostrils to the alveolar line, 6-75 inches. The 

 tooth at the front edge is 6-4 inches long, the crown being 2*6, 

 and the fang 3*8 inches. The large tooth which succeeds after an 



Diagram L VI. Megalosaurus. The Tooth. Natural size. 



I. The tooth of megalosaurus, seen laterally. 

 3. Crenulation of the edges where most regular. 



2. Cross section of the same. 

 4. The finely striated surface. 



interval once occupied by two others, is even of greater size, the 

 crown being 2-7 in length; its fang is also wider, but not so deeply 

 implanted. The other teeth are smaller, and diminish gradually 

 as we go backward, much as in the monitor lizard. The teeth 

 are remarkably curved, with the convexity forward ; very much 

 compressed from side to side, and finishing with acute crenulated 

 edges in front and behind (Diagram LVL). The surface is 

 smooth and polished, the colour usually of a clear brown, the edges 

 quite unworn. 



