belonged to the lower jaw. These, when unworn and et, are about 
two inches long, and of all known teeth mostly resemble those of the 
gua ey have a demi-conoidal crown, with a lozeng 
et. 
gradually expanding triturating surface sloped downward and outward, 
This surface is shield-like in outline, is bordered by enamel internally, and 
pressions of lateral and inferior successors, and appear to indicate that 
the teeth in use, together with those more or less developed within the 
_ Jaw, had a quincuncial arrangement. 
and is three inches in depth. It has an outer parapet wall about tn? 
BE so sae wall appears to have existed on the inner side of Oe 
atter. . 
The cervical vertebre have their bodies prominently convex aor 
and deeply concave behind, and would appear to indicate that deposi 
was correct in assigning similar vertebre, found in the Wealden to be 
of England, to the Iguanodon. Three cervical vertebra, sides. 
the third, fourth, and fifth, are two and a half inches long at the just 
Five succeeding yertebre, not immediately conjoining the Or 
mentioned, and supposed to be anterior dorsals, likewise have ‘ach 
concave bodies, At the sides of the latter they are from 3 to oat 
long, and posteriorly are 34 inches wide, ‘The sides of their eae 
i ati ib; but no articular mark 18 my 
le at the sides o . Two other vertebra, perhaps concave 
dorsals, have the bodies slightly prominent in front and tly 
d; and they are 3} inches long at the sides, and | 
posteriorly. 
oO 
