238 J. W. HULKE ON POIKILOPLEURON BUCKLANDI. 
the two genera might be received. The tooth figured as that of 
Porkilopleuron by Deslongchamps, he thought, belonged to Pliosawrus, 
so that difference did not militate against Mr. Hulke. Having 
regard to the great range of Megalosaurus from Lias to Wealden, 
he doubted whether different species had not been referred to the 
one M. Buckland. 
Prof. Morris expressed his sense of the value of the paper, and 
said that De Blainville had expressed a similar opinion in 1852. 
Both De Blainyville and Deslongchamps refer the long, conical teeth 
figured by the latter to Poikiloplewron. The geological position of 
the deposits was interesting. The Calcaire de Caen was of disputed 
position, some making it the base of the Great Oolite, others the 
equivalent of the Fuller’s Earth. It, however, contains a series 
of fossils not found in the Fuller’s Earth of this country, but 
characteristic of the Inferior Oolite. The Calcaire de Caen, near 
Bayeux, is a marly limestone, but near Caen it is a compact lime- 
stone. ‘The Saurian bones come from a small band not much more 
than a yard in thickness. 
Mr. Hvzxe said that Deslongchamps states that the tooth he 
figured was an isolated one; there was no proof that it was Pozkilo- 
pleuron; and he himself quite thought it was a Pliosawrus tooth. 
