THE SKULL. 



57 



palatini). Near the cranial end of the hard palate are two 

 large openings close together near the middle line: these are 

 the foramina incisiva (or anterior palatine foramina) {s). 



Cavities of the Skull (I'^igs. 42 and 43).— The bones of 

 the cranial portion of tlie skull enclose the cranial cavity for 



Fig. 42. — Skull, with Dorsal Surface Ri'.movku, showing the Cranial 



AND Nasal Cavities. 



«, foianien mngnum; l>, cniulal end of liypoglossal canal; c, jugular foramen; </, 

 internal auditory meatus; e, tentorium, forming the cranial boundary of the cerebellar 

 fossa; y, dorsum sella;;, ^, sella turcica; //, anterior clinoid processes; i, foramen 

 ovale; J, foramen rotundum; k, orbital fissure; /, optic foramen; ;//. chiasmatic 

 groove; ;/, presphenoid bone; o, criloriforui plate; /, lamina perjiendicularis of eth- 

 moid; I/, laljyrinths of ethmoid; r, nares; .r, foramina incisiva or anterior palatine 

 ff)raniina; /, infraorbital foramen; ii, (ipening of the lachrymal canal; IJ, caudal 

 o[)ening of posterior palatine canal; 7c, sphenopalatine foramen; .v, frontal ]irocess of 

 the malar; y, zygomatic process of the temporal; z, appendicular fossa, in the pe- 

 trous bone. 



the brain ; the facial bones enclose the nasal cavity, for the 

 olfactory organ. 



The cranial cavity is divisible into three principal fossaj: 

 the cerebellar fossa (Fig. 43, /) caudad, for the cerebellum; 



