58 



BONES OF THE HEAD. 



palate bone and the root of the internal pterygoid plate, the ptery go- 

 palatine canal; on the inner wall, the spheno-palatine foramen formed by 

 the palate bone and a small part of the sphenoidal spongy bone, and 

 opening into the nasal cavity ; and inferiorly, the posterior palatine canal, 

 which leads down to the palate between the palatal and superior maxillary 

 bones. 



Fig. 51. Fig. 51. BASIS OF THE 



SKULL, VIEWED FROM 

 BELOW, WITHOUT THE 

 INFERIOR MAXILLARY 

 BONE, OF A MAN OF 

 ABOUT TWENTY YEARS 

 OF AGE. 4 



1, palatine plate of the 

 superior maxillary bone 

 the figure is placed near 

 the mesial suture ; 2, pala- 

 tine plate of the palate 

 bone the figure is placed 

 below the transverse su- 

 ture between the palate 

 and superior maxillary 

 bones ; 3, the anterior pa- 

 latine foramen, showing 

 four smaller foramina 

 within ; 4, is placed out- 

 side the posterior palatine 

 foramen, inside the tube- 

 rosity of the superior max- 

 illa, and in front of the 

 smaller posterior palatine 

 foramina in the pyramidal 

 process of the palate bone; 

 5, inner surface of the ex- 

 ternal pterygoid plate of 

 the sphenoid bone ; 6, is 

 placed within the posterior 

 opening of the nares on the 

 inner surface of the inter- 

 nal pterygoid plate ; 7, is 

 upon the upper part of 

 the posterior edge of the 

 vomer ; x marks the pos- 

 terior opening of the pte- 

 rygo-palatine canal, and is 



placed above or in front of the posterior opening of the Vidian canal in the foramen 

 lacerum anterius ; 8, spheno-maxillary fissure leading into the orbit ; 9, foramen 

 spinosum ; 10, foramen ovale ; 11, is placed on the apex of the petrous bone, between 

 the foramen lacerum anterius and the inferior opening of the carotid canal; 12, is placed 

 in the jugular (or digital) fossa of the temporal bone, and indicates the foramen lacerum 

 posterius ; 13, on the articular eminence of the inner root of the zygoma in front of the 

 glenoid cavity of the temporal bone ; 14, meatus auditorius externus; 15, glenoid cavity 

 in front of the fissure of Glaser ; 16, tympanic plate or posterior part of the glenoid 

 cavity, close to the styloid process, below which is seen the stylo-mastoid foramen ; 17, 

 mastoid process, and to its inside the digastric and occipital grooves ; 18, basilar process 

 of the occipital bone, and in front the mark of the still incomplete union with the body of 

 the sphenoid bone ; 19, condyloid articular process of the occipital bone ; 20, is placed in 

 the foramen magnum, and points to the lower opening of the anterior condyloid foramen ; 

 21, posterior opening of the posterior condyloid foramen ; 22, jugular process of the 

 occipital bone, to its inner side the jugular notch, to its outer and above, the stylo- 

 mastoid foramen ; 23, is placed on one side, in front (above in the figure) of the external 

 occipital protuberance, and the line indicates the upper part of the external occipital 

 spine ; 24, superior curved line of the occipital bone ; 2.5, inferior curved line ; 26, 

 groove and ridge of insertion of obliquus capitis superior muscle. 



