XI. 



MEGALOSAURUS HIND FOOT. 



215 



in the crocodile than in the position now assigned to them. The 

 proximal and distal extremities of the tibia in the crocodile have 

 their long diameters divergent ahout 45, instead of being nearly at 

 right angles as in megalosaurus. 



The fibula of megalosaurus is not sufficiently known, but it must 

 have resembled that of iguanodon, with its distal articulation 

 confined to the calcaneum. 



The hind foot of megalosaurus is known only in respect of the 

 astragalus (already described), metatarsals, and ungual phalanges. 

 In the restoration (Diagram LXIV.) 1 have added, conjecturally, the 

 remaining phalanges and calcaneum, trusting to the crocodilian 

 analogy of the whole. What were the bones of the tarsus, and 

 whether there were or were not a fourth toe, I have no know- 

 ledge. Three metatarsals in the Oxford Museum, apparently 



o m, 



vi in n 



Diagram LXVIII. Metatarsal Bones of Megalosaurus, with additional illustrations. 

 Scale one-tenth of nature. 



I. Three metatarsals in apposition, from Swindon, which appear to be megalo- 

 saurian. 2. The appearance of these at the proximal end. 3. The appearance 

 at the distal end. 4. The appearance of the corresponding bones in the crocodile 

 at the proximal end. 5. The appearance of the same at the distal end. 6. Iguanodon, 

 proximal ends of metatarsals. 7. The same seen at the distal end. 



of megalosaurus, lying together in their original apposition, have 

 been obtained from the Kimmeridge clay of Swindon, and seem 

 to indicate a tridactyle foot (Diagram LXVIII. fig. i); several long 

 detached bones of the same general form have been obtained from 



