xx.] AKTERICR AND POSTERIOR EXTREMITY. 371 



SURFACES. 



SCAPULA. 



Pre-scapular fossa. 

 Supra-spinous fossa. 



IDEAL. 



I. Vertebral. 



Post-scapular fossa. 2. Pre-axial. 



Infra-spinous fossa. 



Sub-scapular fossa. 3. Post-axial, 



PELVIS. 



Sacral surface. 



Inner surface of ilium, 

 behind linea arcuata 

 interna, including the 

 articular surface for 

 the sacrum, and the 

 portion of the bone 

 above and below this. 



Iliac surface. 

 Internal iliac fossa. 



Gluteal surface. 



BORDERS. 



SCAPULA. 



Glenoid border. 

 Posterior border in 



most animals. 

 Axillary border in 



Man. 



Spine. 



Coracoid border. 

 Anterior border in 



most animals. 

 Superior border in 



Alan. 



IDEAL. 



PELVIS. 



I. External. 



2. Antero-intenial. 



Acetabular border. 

 Anterior border. 



Pubic border. 



Linea arcuata interna. 



3- 



Postero-internal. Ischial border. 



Posterior border. 



As the humerus in ordinary quadruped Mammals is 

 rotated backwards from its primitive position, and the femur 



B B 2 



