CHAPTER III. 



PART III. 

 FOSSIL BATRACHIANS AND SAUKIANS. 



INTRODUCTORY TEETH OF REPTILES VERTEBRA OP REPTILES BICONVEX 

 CAUDAL VERTEBRA SWANAGE CROCODILE GEOSAURUS MACROSPONDYLUS 



CKOCODILUS TOLIAPICUS CROCODILUS SPENCERI TELEOSAURUS PRIS- 



CUS TELEOSAURUS CHAPMANNI (ENINGEN SALAMANDER PTERODACTYLES 

 MOSASAURUS POLYPTYCHODON. 



INTRODUCTORY REMARKS. The fossil reptilian remains we 

 have now to examine, consist of the bones of the skeleton, 

 either detached, or imbedded in the rock somewhat in their 

 original relative position, of the osseous dermal scutes and 

 spines, which in certain gigantic extinct saurians are greatly 

 developed, of the bony sclerotic plates of the organs of 

 vision, and, very rarely, of the cartilaginous expansions and 

 dermal integuments of the paddles and other parts in a car- 

 bonized state. These softer tissues appear, in some instances, 

 to have been converted into adipocire, and subsequently per- 

 meated by mineral matter. 



The Gallery contains examples, more or less illustrative, of 

 species and genera of the following orders of the class Reptilia, 

 viz. : 1. Batrachians, or the Frog-tribe ; 2. Ophidians, or 

 Serpents ; 3. Lacertians, or Lizards ; 4. Enaliosatirians, or 

 marine Lizards ; 5. Pterosaurians, or flying Lizards ; 6. Cro- 

 codilians; 7. Dinosaurians, or extinct colossal Lizards. 



In the " Medals of Creation," ! I have given a concise expo- 

 sition of the most important and easily recognisable characters 

 of the bones and teeth, and other parts of these animals, that 

 are met with in a fossil state, for the guidance of the collector 

 unacquainted with the rudiments of osteology ; and to that 



1 Vol. ii. chap. xvii. pp. 688707. 



