IN THE 0EDEE SATJEOPTEEYGLA . 



135 



join by a longitudinally extended suture (ib. ib., s, s) below tbe 

 thoracic part of the abdominal cavity. Posteriorly to (' sacrad of) 

 this mesial suture, the coracoids diverge and terminate freely by a 

 broad margin, each with an angle (ib. ib. 52') inclining " laterad." 

 Anteriorly (< ; atlantally ") the sutural portions slightly diverge (to. 



Fig. 2. — Diagram of Stemo-coraco-scapular mass in Pliosaurus. 



ib. 52') and expose the hinder (" sacral ") end (ib. ib., ms) of the 

 mesial plate, 59, representing an episternum. Laterally, each cora- 

 coid contracts in length, becomes thickened, and presents two syn- 

 desmotic or roughened articular surfaces : the hinder one (ib. ib. ti) 

 contributes the corresponding portion of the articular cavity for the 

 humerus, the fore one joins the scapula (ib, ib., 5i) by the suture, 

 ch, laterad of which the scapula contributes the fore portion, h, of 



