204 THE ANATOMY OF VERTEBRATED ANIMALS. 



becomes covered above and at the sides by a large bone, 

 which meets with its fellow in the middle Line, and occu- 

 pies the position of the lachrymal, prefrontal, and nasal. 



Fiir. 66. 



Fir. 66.— Longitudinal sections of the skull of the Turtle. The upper 

 figure represents the entire skull with the outline of the brain in 

 situ ; the lower gives a larger view of the inner face of the bones of 

 the posterior moiety of the skull. 



The premaxillse are small, and usually united together. 

 There is a single vomer, produced downwards into a median 



