CHAP, in.] SKELETON OF THE HEAD AND TRUNK. 75 



34. The LACHRYMALS are also very small bones, one of which 

 is placed at the anterior part of the inner wall of each orbit (Fig. 46, 

 la), having the frontal above, the os planum behind, the nasal pro' 



Fig. 41. RIGHT XASAL. 



A. External surface. 



B. Surface turned towards the other nasal. 



C. Outer lateral surface. 

 n. External angle. 



7i. Fossa for nasal process of maxilla. 



Fig. 42. RIGHT LACHRYMAL. 

 A. Outer surface. 

 13. Inner surface. 



cess of the maxilla in front, and the orbital plate of the same bone 

 below. Each lachrymal is marked by a vertical groove and notch (n), 

 which, by joining the similarly directed groove on the posterior side 

 of the nasal process of the maxilla, forms a foramen and canal, 

 called " lachrymal," which leads from the orbit to the nasal cavity. 

 35. The PALATINES are two bones which by their median 

 junction behind the maxilla), complete the bony palate, which, as 

 we have already seen, is partly formed by the palatine plates of the 



A. Ventral aspect. 



B. Cranial, or dorsal aspect. 



C. Anterior aspect, 

 a. Ascending plate. 



Fig. 48. RIGHT PALATINE BONE. 



7(. Horizontal plate. 

 3. Palatine foramen. 

 5. The spheno-palatine foramen. 



maxilla. The palatine is irregular in shape, consisting mainly of 

 two unequal plates, which are inclined inwards towards each other 

 at an acute angle one ascending, one horizontal. The bone is 

 wedged in between the maxilla in front and the pterygoid behind. 

 It bounds the meso-pterygoid fossa laterally, and the hinder part oi 

 the nasal cavity inferiorly ; and it forms part of the floor and of the 

 inner wall of the orbit. 



The ascending plate (a), which is the main portion of the bone, is 



