ANNLYEESARY ADDRESS OF THE PRESIDENT. 49 



that a true interclavicle as also true clavicles, both present in Ten- 

 th yopterygia, are absent in Sauropterygia. 



Pig. o. — Shoulder-girdle of Tipa dorsigera. (After Parker.) 



o.st, the oinosternum ; sc, the scapula ; s.sc, the suprascapula ; per, the prffi- 

 coracoid ; cr, the coracoid; cr.f, the coracoid foramen; e.cr. the epicoracoid 

 st, the sternum. 



Pig. 6. — Shoulder-girdle of Calamites cyaneus. (After Parker.) 



o.st, toe omosternum ; per, the prascoracoid ; sc, the scapula ; s.sc, the 

 suprascapular; scf, the scapular foramen ; cr, <he coracoid. 



