the name Proteo-saurus to the fossil skeleton , &c. 215 
Its place in the chain of animal creation is clearly pointed 
out to be between the proteus and lizard, and will be suffi- 
ciently marked out by calling it Proteo-saurus. 
Explanation of the Plates. 
Plate XIII. The representation of a portion of the skull of 
the Proteo-saurus, half the natural size, showing the form of 
the nasal bones immediately before the orbit. This is the only 
specimen in which these bones have been met with entire. 
Plate XIV. The representation of the sternum in an 
entire state, in its natural situation, confirming every thing 
shown in a Plate in a former paper, and determining its 
extent, which was not before so exactly known. The appear- 
ance of the ribs, shows that they come forwards towards the 
sternum in a bony form, as in the camelion, from which 
however they differ in having no joint, each rib being made 
up of one piece through its whole length, and at that part 
which forms the curve there is an increase of substance, 
making it stronger than the rest. There is something simi- 
lar to this in the ribs of the chastodon of Sumatra, a des- 
cription of which, by Mr. Bell, has a place in the 83rd 
volume of the Philosophical Transactions. The figure is 
of the natural size, which is the smallest that has come 
under my observation ; the drawing is made by Mr. De la 
Beche. 
Plate XV. Fig. 1. The representation of the skeleton 
of the Proteo-saurus, more entire than any hitherto met with ; 
it is of the natural size. The different bones of which it is 
composed are sufficiently perfect, and sufficiently in their 
