THE IGUANODON AND HYL^OSAURUS. 
279 
While examining^ the scapula above described, I was re- Fig- i- 
minded of the fractured portions of two long- flat bones Part of the Maidstone Iguanodon. 
in the Maidstone specimen which I had often in vain 
attempted to decipher. One of these bones* lies across 
the rig-ht femur, as shown in the annexed diag’ram (fig;. 1). 
Upon repairing’ to the British Museum, the identity of these 
bones was immediately apparent ; they prove to be the 
right and left scapulae ; consequently the coracoids above 
mentioned, which are adapted to this form of scapula, also 
belong- to the Iguanodon-j-. 
As the clavicles, coracoids, and scapulce, are now deter- 
mined, the structure of the pectoral arch of the Iguanodon 
may be regarded as established ; and although the sternum 
is at present unknown, and the relative position of the several 
parts can only be conjectured, I have ventured to attempt 
the restoration of this important part of the skeleton of 
the extraordinary being on whose osteology I have bestowed so much time and 
labour. The annexed outline represents the arrangement which appears to me the 
most natural. 
Fig. 2. 
Restoration of the Pectoral Arch of the Iguanodon. 
1. Two metacarpal bones. 
2. Four consecutive dorsal vertebrae. 
3. A detached dorsal vertebra. 
4. Humerus. 
5. A detached rib. 
6. The right femur. 
7. Scapula lying across the shaft of the femur. 
8. Distal end of the corresponding Scapula. 
9. A detached dorsal vertebra. 
* Figured in Philosophical Transactions, 1841, Plate VIII. fig. 30. 
t The Scapula with a long slender process extending from the head of the bone, which is figured in Philo- 
2 o 2 
