522 



ZOOLOGY 



SECT 



backwards so as to join the paroccipital process, which is greatly 

 elongated. When an auditory bulla is developed, it is formed by 

 this bone, the tympanic being always small, and never ankylosed 

 to neighbouring bones. Tlie internal carotid artery perforates the 



cbd 



Fig. 1131. — Skeleton of VTallaby {HaUiiatv.rv.s ualabntua). The scapula is represented as 

 raised somewhat higher than it would be in the natural relations of the parts ; the head of the 

 femur has been separatetl from the acetabulum, acet. acetabulum ; acr. acromion process ; 

 ast. astragalus ; ca.U: caleaneum ; cbil. cuboid ; chev. chevron bones ; cl. clavicle ; cun. cunefonu 

 of carpus ; epi. epipubis ; fh. fibula ; /eiii. femvir ; hd. head of femur ; hii. humerus ; U. ilium ; 

 isch. ischium ; oOt. obturator foramen ; orb. orbit ; pis. pisiform ; pub. j^ubis ; rad. radius ; 

 r?)i. first rib ; ?Vji^. last rib ; se. scapula ; st. sternum ; tb. tibia ; troch. gi-eat trochanter of 

 femur; uln. uhia ; unc. unciform ; IF. fourth toe. 



basisphenoid. The optic foramen is not separate from the 

 sphenoidal fissure. In all except Tarsipes the angle of the 

 mandible sends inwards a remarkable process {ctng.), and is said 

 to be inflected. 



In the pectoral arch of the Marsupials the coracoid process is. 



