116 
PLESIOSA URIA FROM THE 
PLESIOSAURIA 
FROM THE OXFORD CLAY. 
Exhibited in Cabinet III. 
Case. Shelf. 
Ill 
a 
Specimen. 
On a, b, c are the remains of a Pliosaurus from 
the Oxford Clay of St Neots. In the Lec¬ 
ture-room, between Compartments B and C, 
is an os pubis of the same animal. They 
were collected and presented by J. J. Evans, 
Esq., and may be named after the disco¬ 
verer, Pliosaurus Evansi. 
1 —4 fragments of ribs. 
5—9 neural arches of vertebrae. 
10 coracoid; it is two feet long, and thirteen 
inches broad at the glenoid cavity. 
Ill b 1 atlas and axis, apparently not anchylosed; 
there is a large subvertebral wedge bone 
which does not appear to be anchylosed; and 
the lateral elements of the atlantal cup are 
lost with the neural arches. Each centrum 
is an inch and a half long from back to front, 
3 inches wide from side to side, and 21 high 
from the neural to the haemal surface. The 
second vertebra has a large tubercle for a 
rib at the base of the side of the centrum. 
The second wedge bone is lost. 
