ON DASYCEPS BUCKLANDI 265 
transverse diameter. Six inches and a quarter in front of the occipital 
margin, or on the line of the external nares (ce, 4) the transverse 
diameter of the skull is § inches. The postero-lateral angles (a, 0,) of 
the cranium are truncated, and in front of them the lateral contour 
sweeps inwards (4, d,) and is then continued, in a nearly straight line, 
forwards to the obtuse end of the snout, which measures about 
2 inches in width, half an inch behind its extremity (g,#). The 
strong postero-lateral angles of the cranium project for 2 inches 
behind the posterior margin of the occiput (2), which margin is inter- 
rupted, between its centre and these produced postero-lateral angles, 
by two large and stout pointed processes (#, #,) which project 
backwards for fully an inch and a half. 
In the middle line, 14 inch in front of the occipital margin, or on 
a level with the posterior margins of the orbits, the bony substance 
presents a rounded parietal foramen (/) one-third of an inch wide. 
Just in front of it lies a transverse suture (7), separating the parietal 
from the frontal bones, which is slightly convex forward, and presents 
in the middle line a slight backward sinuation, whence a median 
suture (7) can be traced for a short distance forwards. At x’ is what 
appears to be the anterior continuation of this suture, which terminates 
abruptly in a broad oval space (a, /, g,) 32 inches long, and narrow 
behind, but gradually widening in front, till at 2} inches from its 
posterior extremity it attains a width of 1} inches. The contours of 
this space are symmetrically and evenly rounded, and where its 
surface has remained unbroken, as at (jf), it is perfectly smooth, 
presenting in this respect a marked contrast to the strongly pitted 
impressions everywhere left by the adjacent facial bones. 
The bony edges which form the boundaries of this area are, 
in fact, quite sharply defined, and I could nowhere find the least 
trace of their having been continued into the substance of the matrix 
which fills the area. I can only imagine, therefore, that, during life, a 
membranous, or at most cartilaginous, substance must have filled this 
interspace. 
The orbits (2, 2,) rounded spaces about an inch in diameter, are 
situated very far back, and are remarkably small in proportion to the 
size of the skull. They are placed about midway between the middle 
line of the skull and its outer margin. The round external nostrils (s, s) 
also proportionally very small, their diameter not exceeding half an 
inch, are in like manner situated very backwardly, their anterior 
margins being more than 3 inches from the end of the snout. 
On the left side of the fossil (the right side of the skull) there is, 
between the nostril and the facial fontanelle (as the area, , 7, may be 
