264 ON DASYCEPS BUCKLANDI 
the occipital region to the end of the premaxilla (Fig. 1, z, w), has 
been so split that the upper wall remains attached to the one half of 
a block of sandstone, while the lower is imbedded in the other ; 
consequently only the smooth inner faces of the cranial bones are for 
the most part displayed, though a portion of the frontal bones which 
adheres to the lower half of the cranium exhibits the upper or outer 
Ww 
Fie. 4, 
surface of those bones, and the character of this surface is well shown 
by the impressions which remain where the bony plates themselves 
have disappeared. 
The upper half of the cranium is in better condition than the 
other. It has the form of an isosceles triangle, whose apex is abruptly 
rounded off, and whose base (the space between the outer edges of 
the quadrate bones, a, 6, Fig. 1,) measures 94 inches. An inch anda 
half in front of the posterior margin of the occiput, on the line of the 
posterior margins of the orbits (¢,d,) the skull measures 72 inches in 
