150 



ANIMAL BIOLOGY. 



[Part I. 



sphenoidal process which meets a process of the squamosal. 

 In the chick there is a membranous fenestra in each. The 

 parietals (pa.), on the other hand, form part of the roof of the 



etli. 



P4i.H 



FIG. 48. SKULL OF FOWL. 

 A. From the side. B. From below. 



a. n. f. Anterior nasal fossa, a. p. q. Anterior process of quadrate, a. s. 

 Ali-sphenoid. an. Angular, art. Articular. Z>. o. Basi-occipital. &. t. Basi- 

 temporal. d. Dentary. e. o. Ex-occipital. /. TO. Foramen magnum, fr. 

 Frontal, Ji. q. Head of quadrate, ju. Jugal. Ic. Lachrymal, m. eth. Meseth- 

 moid. mx. Maxilla. na. Nasal, olf. Olfactory foramen, op. Optic foramen. 

 pa. Parietal, pi. Palatine, pt. Pterygoid. p. mx. Fre-maxilla. p. s. Pre-sphenoid. 

 qu. Quadrate, q. j. Quadrato-jugal. r. Rostrum, s. a. Supra-angular, s. o. 

 Supra-occipital, sp. p. Sphenoidal process, sq. Squamosal. vo. Vomer. 

 o. c. Occipital condyle. 



posterior region of the brain-case. Between these two elements 

 of the parietal segment lies the large squamosal (sq.), behind and 

 below which is the auditory capsule. 



