54 



Bones of the Skull. 



Angulus sphenoidalis ossis parietalis 

 Squama temporalis, 



Fades temporalis alae magnae ossis sphenoidalis 

 .Facies temporalis ossis frontalis 



Fossa 



temporalis 



Processus zygomaticus '" ^^ 



ossis temporalis 



Crista infratemporalis 



Fossa infratemporalis 

 Foramen sphenopalatinum 



Fossa pterygopalatina 

 Fissura orbit alis inferior 



- Os lacrimale 



- Os,nasale ; 



Os 

 zygomaticum 



Foramen 

 infraorbitale 



Corpus 

 maxillae 



Lamina lateralis processus pterygoidei 



Facies infratemporalis maxillae 



67. Right temporal fossa, fossa iemporalis, from without. 



(The arcus zygomaticus has been partially sawed away.) 



The fossa temporalis (see also Figs. 55 and 56) lies on each side on the lateral 

 surface of the skull and is, for the most part, open lateralward. Its medial surface is formed 

 by the most inferior part of the facies parietal oss. pariet., by the facies tempor. squamae 

 tempor., the facies tempor. oss. front., and the facies tempor. of the ala magna oss. sphen.; 

 the anterior surface by the facies tempor. oss. front, and the facies tempor. oss. z}'gom.; the 

 external wall by the arcus zygom.. Below and medianward it goes over into the fossa infra- 

 tempor.. On the medial surface run the sutura squamosa (between squama tempor. and margo 

 squamos. oss. pariet.), the sutura sphenosquamosa (between squama tempor. and margo squamos. 

 alae magnae oss. sphen.), the sutura sphenoparietalis (between angul. sphen. oss. pariet. and 

 angul. pariet. alae magnae oss. sphen.), the sutura coronalis (between margo front, oss. pariet. 

 and margo pariet. oss. front.), the sutura spheno frontalis (between pars orbital, oss. front, 

 and margo front, alae magnae oss. sphen.) and the sutura zygomaticofrontalis (between proc. 

 zygom. oss. front, and proc. frontosphen. oss. zygom.); on the anterior surface, the suture last 

 mentioned and the sutura sphenozyyomatica (between os zygom. and margo zygom. alae 

 magnae oss. sphen.); on the lateral surface the sutura zygomaticotemporalis (between proc. 

 tempor. oss. zygom. and proc. zygom. oss. tempor.). On the anterior wall lies the foramen 

 zygomaticotemporale. 



The fossa infratemporalis (0. T. zygomatic fossa) (see also Figs. 59 and 60) lies on 

 each side below and medianw r ard from the arcus zygom., goes over above into the fossa tempor. 

 and is open behind and below. Its upper wall is formed medianward by the facies infratemp. 

 of the ala magna oss. sphen., the anterior oblique wall by the facies infratempor. maxillae and 

 the facies tempor. oss. zygom., the lateral wall by the ramus of the lower jaw and the medial 

 by the lamina lat. proc. pteryg.. On the anterior surface the sutura zygomaticomaxillaris 

 (between os zygom. and proc. zygom. maxillae) is visible. At the junction of the anterior and 

 medial surfaces lies the entrance to the fossa pterygopalatina. On the anterior surface can be 

 seen the foramina alveolaria on the tuber maxillare and above this the lateral extremity of 

 the fissura orbitalis inferior. 



