J. W. HITLKE ON THE STEENAL APPAKATUS IN IGUANODON. 475 



bearing ribs. The non-recover}^ of such a sternum by Mr. Beckles, 

 when we bear in mind that under his personal superintendence a 

 verj' considerable part of the skeleton, including both fore limbs, 

 was exhumed, favours the suggestion that I threw out in my Pre- 

 sidential Address in 1882, that the sternum in Iguanodon may have 

 been cartilaginous, as in living Crocodiles. 



EXPLANATION OF PLATE XIV. 



Fig. 1. The clavicles with the interclaricle. Half natural size. In Mr. Beckles' s 

 collection. 



2. The bones suggested by Dollo as the moieties of the sternum. 



3. Schema of the restored pectoral arch. 



The following lettering applies to all the figures: — cl, clavicle; id, inter- 

 clavicle ; cor, coracoid ; ep. cor, epicoracoid ; sc, scapula ; cs, costce ; st, (carti- 

 laginous?) sternum. 



Discussion. 



The Peesident congratulated the Author on the interestiug^dis- 

 covery he had made in connexion with the anatomy of the Dino- 

 saurs. 



