ELEMENTS OF MAMMALIAN ANATOMY. 

 1C 



prn 



19 



FIG. 17. VENTRAL ASPECT OF THE SKULL WITH THE LEFT AUDITORY 

 BULLA REMOVED. 



asp, Alisphenoid ; ap, anterior palatine foramina ; bs, basisphenoid ; bl, 

 auditory bulla; bo, basioccipital ; c, canine tooth; ^petrous portion 

 of the temporal; en, occipital condyle; ea, external auditory meatus; 

 eh, opening of the Eustachian tube ; fr, frontal ; fm, foramen mag- 

 num; gc, glenoid cavity; gn, postglenoid process; hm, hamular proc- 

 ess of the pterygoid; ic, incisor tooth; if, infraorbital foramen; in, 

 incus; jg, jugular foramen; Id, lambdoidal ridge; mx, maxilla; ml, 

 molar tooth ; mp, mastoid process ; ms, mastoid portion of the tem- 

 poral ; ma, malar ; m, malleus ; osp, orbitosphenoid ; ov. foramen 



