Biographical Notice of Dean Conybeare. 69 
mediate in character between those of the Ichthyosaurus and the 
Sea-turtles; and thus in every respect he laid a sound founda- 
tion for his new genus. 
It is to be remarked that this paper was given as the joint 
He se fee of Mr. Conybeare and Sir Henry Dela Beche, to whom 
r. Conybeare most liberally ascribed a full share of the merit 
of the discovery; but, allowing Sir Henry every praise for his 
assistance in that discovery and in all the geological details, I 
believe the sagacity and skill exhibited in the osteological details 
and reasonings have always been ascribed to Mr. Conybeare. 
In a second paper, read May 8, 1822, Mr. Conybeare was en- 
abled to describe much more fully all the relations of the genera 
Ichthyosaurus and Plesiosaurus, from the discovery of other re- 
mains, both of the Jchthy us and Plesiosaurus, by his coadjutor 
Sir Henry DelaBeche. A very minute examination of the teeth, 
especially, enabled him to point out that those of the Jcthyo- 
Saurus were more intimately related to the teeth of the crocodile 
than to those of other Lacerte (an opinion then at variance with 
the opinions of some anatomists), whilst at the same time, in 
other respects, the analogy was in the other direction, for Cony- 
beare observes, “in pursuing, however, the history of the teeth 
of the Ichthyosaurus to the last stage, we quit these analogies with 
the crocodile, and arrive at another point wherein the Ichthyosau- 
recent type are only instances of its a EE ron the fossil.” 
ad not at this time led to 
Mr. Conybeare to the follo conclusion: “On the whole 
then, the manner in which the ribs of the Plesiosaurus articulate 
