MAMMALIAN CHARACTERISTICS 



to become one of the ear ossicles, probably the incus. 



CL -° 



779 

 The otic 



ST.R 



Fig. 465. — Breastbone, ribs, pectoral girdle, and cervical 

 vertebrae of a gibbon. — From a Specimen. 



A., Acromion process of spine of scapula, with the clavicle (CL.) abutting on it ; L., a 



ligament ; C.P., coracoid process, fused to the scapula (SC.), sharing in making 



the glenoid cavity {G.C.). 

 PS., Presternum, on which the lower ends of the clavicles rest ; ST.K., sternal 



portion of a rib ; \'.R., vertebral portion of a rib ; ST., the last segment of the 



meso-sternum ; below it is the xiphisternum. 

 C.V., Cervical vertebrae with transverse processes ; 0., tlie odontoid process of the 



axis or second vertebra ; the atlas or first vertebra is not shown. 



bones fuse with each other to form a compact periotic . A bony 



