THE CAROTID ARTERIES IN THE RABBIT 107 



The occipital artery varies considerably in its origin. It may be 

 a branch from the internal carotid artery as in figures 2, 3, 7 and 12 ; 

 it may branch as an independent twig from the external carotid 

 artery as in the normal condition as shown in figures 4, 6, 8 and 1 1 ; 

 or it may be a branch from the temporal as in figures 5, 9 and 10. 



In one case, figure 3, the lingual and the external maxillary ar- 

 teries may be regarded as branches from the internal maxillary, 

 since their points of origin are well cephalad to the point at which 

 the temporal branch is given off. 



Department of Zoology and Entomology, 

 lowA State College. 



