166 COMPARATIVE MORPHOLOGY OF VERTEBRATES. 
y 
Fic. 167.—Brain and cranial nerves of Carcharias littoralis (Princeton 310), natural size 
bo, olfactory bulb; br’-*, branchial nerves; cr, corpus restiforme; d, diencephalon; e, ep: 
physis; ec, external canal of ear; ev, external rectus; eo, external oblique; hm, hyomandibula 
nerve; /, lateralis nerve; md, mandibularis nerve; ms, mesencephalon, also, maxillari 
superior; 00, olfactory organ; os, ophthalmicus superficialis nerve; of, olfactory tract: pa 
palatine nerve; pc, posterior canal; po, post-trematic branch; pr, pretrematic branch; « 
superior oblique; sr, superior rectus, ¢, telencephalon; #, utriculus; v, visceral branch of X 
I-X, cranial nerves. 
