THE LIZARD. 145 



71. A cartilaginous process, the inferior turbinal, passes inwards 

 from the anterior part of the lateral wall of the olfactory capsule, 

 and serves to increase the surface of the olfactory mucous membrane. 



72. The septo-maxillary (Fig. 35, s.mx), a small (paired) nodule 

 of bone, attached to the side of the nasal septum near its anterior 

 termination. 



VII. In each ramus of the mandible make out the 

 following bones : 



73. The articular, forming the proximal end of the 

 jaw, and furnishing both the cavity for articulation with the 

 quadrate, and the backwardly produced angle or angular 

 process of the mandible : from its anterior or distal end, 

 which is enclosed in a sheath formed by the dentary ( 76) 

 the slender Meckel's cartilage is continued forwards 

 to the symphysis or point of junction of the two rami. 



74. The angular, a splint-like bone covering the ventral 

 edge and the lower half of the outer surface of the articular, 

 but leaving the angular process exposed. 



75. The supra-angular, similarly related to the dorsal 

 edge and the upper half of the outer surface of the articular. 



76. The dentary, forming the main part of the distal 

 portion of the mandible and bearing all the teeth. 



77. The splenial, a flat splint applied to the inner face 

 of the dentary, and fitting, at its hinder end, into a notch 

 between the articular and the angular. 



78. The coronary, a small somewhat conical bone, 

 forming the upwardly directed coronoid process im- 

 mediately behind the last tooth : it articulates with the 

 articular, dentary, and splenial. 



VIII. The hyoid apparatus (Figs. 39 and 40) consists 

 of the following parts : 



79. The body of the hyoid or basi-hyal (Fig. 40, 

 b.hy\ a median flattened rod of cartilage, pointed in front. 



80. The anterior cornua (a.co), paired rods of cartilage, 



