STRATA OF TILGATE FOREST. 53 



sufficiently indicated, to prove the resemblance of the specimen to the 

 vertebral end of the ribs of the crocodile, PI. 2, fig. 4. k. i. Os sepm^es de 

 Crocodiles. Cuvier, Tome iv. 



SO. A rib twenty-one inches long, with both extremities destroyed. 

 The sternal end is transversely elliptical, and about two inches in circum- 

 ference ; the bone gradually increases in width towards the opposite ex- 

 tremity, where its inner surface becomes nearly flat, and the outer slightly 

 ridged; the width of this portion is equal to the circumference of the 

 sternal end. Fragments of ribs of this kind occur also at Stonesfield. 



From the mutilated state of the following specimens, the references to 

 Cuvier's figures of the bones of the recent crocodile, are probably in some 

 instances erroneous ; they may, however, for the most part, be regarded 

 as nearly approximating to correctness. 



31. Portion of the sternal end of the clavicle? fig. 10, PL 2. (Os 

 separes de Crocodiles. Cuvier, Tom. iv.) 



32. Head of the radius ? b, fig. IS, PL 2. 



33. Carpal extremity of the radius? b, fig. 13, PL 2. 



34. Part of the os pubis? c, fig. 15, PL 2. 



35. Fragment of the os ilium? a, fig. 15, PL 2. 



36. Lower extremity of the femur? B, fig. 12, PL 2. 



37. Some fragments of a cyUndrical bone, probably the femur, indicate 

 an animal of a gigantic magnitude. I have specimens from ten to twenty- 

 seven inches long, and from eleven to twenty-five inches in circumference ; 

 the substance of the bone being more than two inches thick ; some ex- 

 amples have large foramina for the passage of blood-vessels*. 



38. Lower extremity, and other portions of the tibia? fig. 11, PL 2. 



39. Fragments of the metatarsal bones? fig. 16, PL 2. 



* I may perhaps be accused of indulging in the marvellous, if I venture to state, that 

 upon comparing the larger bones of the Sussex monitor with those of the elephant, there seems 

 reason to suppose, that the former must have more than equalled the latter in bulk, and have 

 exceeded thirty feet in length ! and yet some fragments of bone in my possession, warrant such 

 a conclusion. 



