216 THE BIOLOGT OF THE ANIMAL 



the scapular portion, the supra-scapula or carti- 

 laginous part, and the scapula or bony part. 

 What is the shape of the supra-scapula ? Is it en- 

 tirely cartilaginous ? Is it attached by a movable 

 or by an immovable connection to the scapula? 

 Draw the supra-scapula. "What is the shape of 

 the scapula? Notice the depression, forming a 

 portion of the glenoid cavity, at the ventral end 

 of the scapula. What occupies this depression ? 

 Draw the scapula. Study the two parts of the 

 coracoid portion of the girdle, the posterior part 

 or coracoid bone, and the anterior part or clav- 

 icle. What is the shape of the coracoid ? Does 

 any part of it help to form the glenoid cavity ? 

 Draw the coracoid bone. What is the shape of 

 the clavicle ? How is it attached to the scapula ? 

 Does the clavicle unite directly with the scapula? 

 Between the coracoid and the clavicle is the 

 coracoid foramen. How is it formed ? What 

 is its shape? Examine the sternum, consisting 

 of the following parts named from before back- 

 ward : episternum, omosternum, epicora- 

 coids, sternum proper, and xiphisternum. 

 Locate first the epicoracoids, a pair of narrow 

 cartilages lying between the inner ends of the 

 coracoids and clavicles. Posterior to the inner 

 ends of the coracoids lies the sternum proper. 

 What is its shape ? Length ? Is it bone or carti- 

 lage ? Draw. At the posterior end of the ster- 

 num find the xiphisternum. Of what is it com- 

 posed ? What is its shape ? Draw. In front of 

 the clavicles find the omosternum. Is it attached 

 to the clavicles ? What is its shape ? Compare 

 with the sternum proper. Draw. Attached to 



