74 BONES OF THE HEAD, 



CLASSIFIED LIST OF THE BOXES OF THE HEAD AND THEIR 

 TYPICAL COMPONENT BAKTS*:— 



1. BONES FORMING THE CEANIO-FACIAL AXIS. 



Mesethmoid ; Vertical plate of the ethmoid bone, including the cartilagiuous. 

 naf^al septum, which is partially enclosed by 

 Vomeric ; The Vomer. 



Presplienoid ; Anterior part of the body of the sphenoid bone. 



Basisphenoid ; Posterior part of the body of the sphenoid bone, including the 

 sella turcica. 



Basioccipital ; Basilar process of the occipital bone. 



2. UPPER OR NEURAL ARCHES, FORMING LATERAL AND UPPER WALLS 

 OF THE CRANIAL CAVITY. 



Nasals ; Tlie nasal bones. 



Orbito-sphenoids ; The lesser wings of the sphenoid bone. 



Frontals ; United in the single frontal. 



Alisphenoids ; Great wings of the sphenoid bone with the external pterygoid, 

 plates. 



Parietals : The parietal bones. 



Exoccipitals ; Condyloid portions of the occipital bone. 



Supraoccipital ; Tabular part. 



Interparietal, of some animals, corresponds to the upper part of the foregoing. 



The temporal Ijones interposed between the occipitals and sphenoids consist of 



Periotics, or petro-mastoid bones ; The ])etrous and mastoid portions of the tem- 

 poral bone ; the first including the labyrinth and meatus auditorius intemus. 



Squamosals, or squamo-zygomatic ; Tlie squamous part of the temporal 

 Vjone with the zygoma, including the articular surface of the lower jaw. 



Tympanies ; The tympanic ring and auditory process with the postgienoid 

 part of the temporal bone. 



3. LOWER OR VISCERAL ARCHES COMPLETING THE FACE AND 

 ENCLOSING THE NOSE, MOUTH, AND PHARYNX. 



Ethmo-turbinals ; The lateral masses with the upper and lower turbinated 

 bones of the ethmoid, and the cribrifonn plates. 



liaelirymals ; The lachrymal bones. 



Maxillo-turbinals ; The inferior turbinated bones. 



Premaxillary, or mtemiaxillary ; The incisor part of the superior maxillary 

 bones. 



Pterygroids ; The internal pteiygoid plates. 



Palatals ; The palate bones. 



Maxilla3 ; The superior maxillary bones, excepting the incisor part. 



Malars ; The malar bones. 



Malleus, Incus, and Stapes ; The ossicula auditus or malleus, incus, and 

 stapes. 



Mandibles ; United in the inferior maxilla or lower jaw. 



Styro-hyals with Tympano-hyals (of Flower) ; The styloid process of the 

 temijoral Vione. 



Epi-hyals ; The stylo-hyoid ligaments. 



Cerato-hyals ; The upper or lesser comua of the hyoid bone. 



Basi-hyals ; The liody of the hyoid Ijone. 



Thyro-hyals ; The great cornua of the hyoid bone. 



Branchial Arches ; These follow the jareceding, but are only temporary foetal 

 structures in man and all vertebrate animals, except amphibia and fishes. 



* Tlie names first given, and printed in block type, are tliose received in comparative' 

 anatomy ; those usually employed in Ininian anatomy toUovv, and are printed in common 

 type. 



