94 
f FINOS A URIA FROM THE 
GIGANTOSAURUS MEGALONYX, 
A TERRESTRIAL REPTILE, 
FROM THE KIMERIDGE CLAY. 
Exhibited on Shelf a of Cabinet lxxxiv., and over 
Cabinet lxxxii. 
These bones were found at different times in different loca¬ 
lities. They are the only remains from the Kimeridge 
Clay of the Ely district which are not referable either to 
Ichthyosauria, Plesiosauria, Crocodilia, or Chelonia. And 
as the bones are such as might pertain to one animal, the 
genus Gigantosaurus is constituted to receive them. 
Case. Shelf. No. 
84 a 1 centrum of ? cervical vertebra, very slightly con¬ 
cave in front and very slightly convex behind; 
it hangs a little forward, like a Pliosaur. The 
intervertebral articular surface is 8^ inches 
deep, and appears to have been as wide, and 
circular: in part the posterior surface is rugose 
and pitted as with small-pox. The neural arch 
was supported on short pedicles, between which 
is a narrow neural canal. Below the pedicles 
is on each side a large impressed facet for the 
rib, subdivided by a transverse ridge into a 
small upper part and a large lower part. Below 
the ribs are deep large holes, tw~o smaller ones 
in front and a larger one behind*, which pene¬ 
trate far into centrum and are lined with 
smooth bone surface as far as excavated. They 
have the aspect and the position of air-cells, 
* In the absence of the usual aids, the front and back determinations are 
conjectural. 
