PLATE CCIV 



Left Scapula of the Type of Brontops robustus Marsh 



Plate prepared under the direction of Professor Marsh. One-fourth natural size. (See p. 668) 



1, Lateral or external view, left side; 2, medial or inner view; 3, posterior view; 4, inferior or distal view, a, Tuberosity for the 

 trapezius muscle, running below into a ridge for the acromial portion of the deltoid; c, coracoid process with rugosity for the 

 biceps and coracobrachialis muscle; ch, cervical or anterior border of the scapula, ending below in a tuberosity which was 

 probably the origin of the caput longum tricipitis and infraspinatus secundus muscles; s, spine of the scapula; ss, suprascapular 

 border with rugositj' for insertion of the rhomboideus muscle. The principal muscle attachments of the scapula are given 

 on page 714. 



