55 



such as the lachrymal gland and the membrana nictitans, are also contained 

 in this cavity. 



The teinpi>rul fossa surmounts tho orbit, and is incompletely separated 

 from it by the orbital arch (or process). Oval in shape, lying obliquely from 

 to below, and from within outwards, on the sides of the cranium, the 

 tcmiKiral fossa is limited, within, by the parietal ridge, and outwardly by 

 tin anterior border of the longitudinal root of the zygomatic process. It 

 lodges the temporal muscle. 



Base or superior extremity of the head. This presents the occipital pro- 

 tuberance, cervical tuberosity, occipital foramen, mastoidean ridge and fissures, 

 styloid processes of the occipital bone, stylo-condyloid notches, and the con- 

 dyles. On a lower plane, and behind, the curved portion of the posterior 

 border of the maxillary bone is remarked. 



Summit. Formed by the premaxillary bones and the body of the super- 

 Fig. _'.;. 



LATEKAI. VIKW OF THK NORSK'S SKULL. 



1, Premaxillary Imiie; _', Upper incisors; 3, Upper canine teeth; 4, S'iperior 

 maxillary bone; 5, Infraorbital foramen; G, Superior maxillary spiue ; 7, Nasal 

 bones; 8', Lachrymal bone; 9, Orbital cavity; 10, Lachrymal fossa; 11, Malar 

 12, Upper molar teeth; 13, Frontal bone; 15, Zygomatic process, or arch; 

 16, Parietal bone ; 17, Occipital protuberance; 18, Occipital crest ; 19, Occipital 

 o.U'hl.-: _'". Styloid processes; Jl, Petrous bone; 22, Basilar process; 23, 

 ConJyle of inferior maxilla; 'J4, Parietal crest; '_'.", Inferior maxilla; 26, Inferior 

 molars ; 27, Anterior maxillary foramen ; 28, Inferior canine teeth ; 29, Inferior 

 incisor teeth. 



maxilla, the summit supports t'ue incisor teeth, and presents a tuberosity 

 iimn- or less rounded, according to the age of tho animal. In front, it is 

 surmount! 1 by the external opening of the nasal cavities; this opening, 

 which is comprised between tho external process of the premaxillary bones 

 ainl the nasnl spine, is divided in tho fresh state into two orifices which 



itlltr tin: in >trils. 



<////. the la ud contains the nasal fossie and the cranial cnritif. 

 Tin-so will bo described when the apparatus belonging to them is noticed. 

 :he respiratory and nervous apjmi-.i- 





: U II Al:\TER8 OF THE HEAD IN OTHER THAN 8<'l :i I I. AMMALS. 



.1 IIiAip"i mi. <>\. Sin i r. AM. < ioAT. 1. Oc<-ii"lnl 1*nn . -Tin 1 "i-ij'iUil Unn- in 

 da u ;IM\ ;int'-ri(>r I-HHIW. Tin- ivr\i-al tut- T">it\. r t 



