184 



THE BATH OOLITE PERIOD. 



CHAP. 



measure of the longest head-bones of teleosaurus from the Oxford 

 district is 31*0 inches, indicating a total length not exceeding 

 fifteen feet ; but portions of the jaws and fragments of limb bones 

 indicate a somewhat greater size to be occasionally attained. 



The following Table contains some useful proportionate measures, 

 referred to a uniform length of 1 80 inches measured on the skeleton, 

 without allowance for intervertebral cartilage, which would increase 

 the total length about ten inches. The head-length is between 

 the occipital condyle and the end of the intermaxillary bones : 



For a considerable period the long slender jaws of these truly 

 aquatic crocodiles have been observed at Stonesfield and some other 

 places in the Great oolite near Oxford, as Enslow Bridge and 

 Kidlington. The Oxford Museum contains specimens sufficient 

 for determining the principal characters of the teeth, head, 

 vertebral column, and hind limb. Two species must be admitted, 

 distinctive characters being found in the teeth, lower jaw, and 

 cervical vertebrae. If we were guided by the differences among 

 the teeth, which seem to be teleosaurian, more than two species 

 would be allowed at Stonesfield and Enslow Bridge. 



In Diagram No. XLII. the various patterns of ornamental 

 striation on the teeth appear. In fig. i. two rather short teeth 

 appear in their separate sockets, a little curved, uniformly striated, 

 the strise growing more prominent toward the point and finer 

 toward the base. There is but slight trace of bicarination on these 



