384 



MAMMALIAN ANATOMY 



FIG. 304. 



The vorner presents three other borders, limiting its- two surfaces. 



The short upper border (Fig. 304) is expanded on each side into a 

 wing or ala, which is applied to the side of the sphenoidal rostrum and 



the edge of which joins the edge of 

 the vaginal process of the ptery- 

 goid behind and the edge of the 

 sphenoidal process of the palatine 

 in front. Between the wings of 

 the vomer and the sphenoids are 

 three canals, one median, and two 

 lateral, for blood-vessels and nerves. 

 The anterior border joins the 

 mesethmoid and the cartilaginous 

 nasal septum (Fig. 303). 



The inferior border unites with the maxillaries and palatines. 



On each lateral surface is a distinct oblique groove for the naso- 

 palatine nerve. 



THE MAXILLO-TURBINAL BONES. 



General Description. The Maxillo-turbinals are oblong masses, 

 situated in the lower outer part of each nasal chamber (Figs. 305, 

 306). Each bone is composed of a few scrolls, attached by a thin 

 plate to the outer wall of the chamber on an oblique raised line, which 



FIG. 305. 



THE VOMER, LEFT SIDE. 



1, broad groove receiving the rostrum of the sphe- 

 noid bone ; 2, inferior border articulating with the 

 palatine plates of the maxillaries and the palatine 

 bones; 3, posterior border, the dividing line of the 

 posterior nasal orifices ; 4, grooved border receiving 

 a narrow slip of cartilage, situated between the 

 vomer and the mesethmoid; 5, border for the carti- 

 laginous septum of the nose; 6, nasal surface. 



Infraorbital Foramen. 



With Malar. 



Malar Process. 



Orbital Surface of Body 



L Ridge for Ethmoid. 



* Internal Surface of Nasal Process. 



Maxillo-turbinal. 



Superior Surface of Palatine 

 Plate. 



Tuberosity 



With Right Maxillary . 



With Palatine. 

 LEFT MAXILLARY BONE. SUPERIOR SURFACES. 



