98 



Elementary Zoology. 



front of the basi-occipital, are the large bones which are usually 

 called bast-temporals. They appear, however, to correspond 

 to the " handle " of the dagger-like parasphenoid of the frog. 

 Articulating with the quadrate is a narrow bone on each side, 

 which converges towards its fellow, and is attached to a some- 

 what broader bone which runs forward in a straight line; these 

 two bones are the pterygoid {pg) (posteriorly),^ and the palatine 

 {pa) (anteriorly). Between the palatines is a single compressed 

 bone which is partly bifid posteriorly. This bone is the vomer 

 {v). Its anterior end passes between two inward growths of 



Fig. 42 —Skull of Fowl. (From Gadow.) 

 (For lettering, see text.") 



the maxilliK, which have received a separate name, though they 

 are not separate bones ; they are termed the maxillo-palatines. 

 Another arcade is formed by a chain of thin and splint-like 

 bones connecting the quadrate with the maxilla ; these are the 

 jugal (/), nearest to the maxilla, and the quadrato-jugal {qj), 

 articulating with the quadrate. Finally the quadrate articu- 

 lates with the last of the series of membrane bones, the squa- 

 mosal (sq). 



There remains for consideration the first two visceral arches, 

 ' As to pterygoids and palatines, see footnote to p. 96. 



