72 
ICHTHYOSA URIA. 
Tase. Comp. ]>rawer. Specimen. 
J f x 6—12 Caudal vertebrae from the post-pelvic re¬ 
gion, where ribs are developed and sup¬ 
ported from a single tubercle. The 
tubercles are as low on the sides of the 
centrum as can be without passing on 
to the base. The bones are short from 
front to back. 
J f x 13—16 Associated. 13, coracoid. 14, articular 
end of lower jaw. 15, articular end of 
quadrate bone. 16, undetermined [? post 
frontal]. The coracoid is the largest yet 
found. The lower jaw is not deep at 
the articulation. 
In the supplementary series, lxxxii., are two drawers of 
odd bones of Ichthyosaurus from the Cambridge Greensand, 
chiefly vertebrae. 
