288 



THE BATH OOLITE PERIOD. 



CHAP. 



though of nearly equal size to those mentioned above, appears 

 to agree with no metatarsal or metacarpal bone, but rather to be 

 a first phalangal of extraordinary magnitude. Length, 7.25 inches ; 

 breadth of the proximal spheroidal head, 4-0; its depth, 475; 

 breadth of the distal end with double condyle, 4-9 ; its depth, 

 270. (See fig. i a, Diagram CXII.) 



Diagram CXII. 



I. Sideways. 



Foot- bones of Ceteosaurus (?), from Chapelhouse, near Chipping- 

 Norton. One-tenth of the natural size. 



2. From below. 3. From above. 



Combined with the other bones, it seems to constitute a 

 short, bulky, stiff support for a heavy terrestrial quadruped quite 

 unfitted for aquatic life. There is, however, no certainty that it 

 belongs to the ceteosaurus of Enslow Rocks, or even to that 

 genus. 



Phalangal bones are uncommon in the lower oolitic rocks round 

 Oxford. Megalosaurus gives us a claw-bone, but no other of the 

 series ; one small toe-bone in the Oxford Museum, from Stonesfield, 

 probably belongs to teleosaurus, and we have two phalangal and 

 one ungual bone of ceteosaurus. In the Oxford and Kimmeridge 

 clays indeed the bones of the marine reptiles are common enough. 



The following are the dimensions of the phalangal and ungual 

 bones, the former being much depressed, the latter compressed : 



Fig. i 6, Diagram CXII., from Enslow Bridge. Length, 3-20 

 inches; breadth of proximal face, 4*15; depth, 2*75* 



