G2 
1CHTHY0SA URIA FROM THE 
Case. Shelf. 
X c 
No. 
15—22 rate bones from tbe same animal, c.16 
(right) is mounted to show the articular 
facets on its inner side for the pterygoid 
and the deeper pit for the epiotic bone 
[par-occipital of Owen], c. 15 shows the 
smooth concave unarticular outer side of 
the bone, c.17 and c. 18 are examples 
of left quadrate bones of more elongated 
type, with the articulation for the lower 
jaw sub-ovate, with the pit for the epiotic 
bone descending nearer to the condyle, and 
with the outer side less concave. In c . 19 
the epiotic pit is exceedingly deep and in 
the middle of the bone, c . 20 is a dis- 
c 
tinct species, with a sub-circular condyle 
and a sub-circular facet for the pterygoid 
placed far back, c . 22 is remarkable for 
the great transverse and short antero¬ 
posterior extent of the condyle. 
23—24 [Undetermined.] 
X d 
1—32 Teeth. It has not been found possible to 
discover the same evidence of a variety 
of species from the teeth, as from other 
bones. Where the function was so similar 
as it must have been in the different 
species, it is hopeless to attempt to find 
an index whereby to differentiate struc¬ 
ture in the teeth, d. 1— 14 are from the 
jaws of one individual. The curved teeth 
from the lower jaw generally have the tips 
of the crowns worn. Both crown and 
fang vary much in form and size. d. 17 
shows the immature tooth on the inner 
side of the pulp-cavity. Sometimes, as in 
d. 21 and d . 22, the pulp-cavity is closed 
below. A few specimens have the sub¬ 
quadrate fang irregular and ridged. 
