FOSSIL REPTILES OF DORSET. 3 



The reptilian class includes tortoises, turtles, snakes, lizards, 

 crocodiles, besides six extinct Orders. 



Chelonia Turtles and Tortoises 



Ophidia Snakes 



Lacertilia Lizards 



Crocodilia Crocodiles 



Ichthyopterygia 

 Sauropterygia 

 Anomodontia 

 Pterosauria 

 Deiiiosauria 

 Thecodontia 



ORDER CHELONIA, Owen. 



Trunk ribs, enclosed in dermal ossifications, which, together 

 with them, form broad, flat plates, united by sutures. These 

 and the dorsal vertebrae are immovable, and form the upper part 

 of the bony case, in which the body of the animal is enclosed and 

 covered either by a leathery skin or horny plates, the upper and 

 ventral portions, carapace and plastron, are united at their edges, 

 having apertures for the extrusion of the head, tail, and limbs. 

 The scapular and pelvic arches are enclosed within the carapace. 



The first appearance of a Chelonian is in the lithographic stone 

 of Solenhofen, in Bavaria, a bed intermediate between the 

 Kimmeridge Clay and the Coral Rag. 



The Order consists of the four following families : 

 Testudinse Land-tortoises 

 EmydidsB Freshwater-tortoises 



Cheloniidse Sea-turtles 

 Trionycidse Freshwater-turtles 



Emydidae and Cheloniidse only have been met with in the 

 county. 



FAMILY EMYDIDAE. 



PALUDINOSA. 

 These Freshwater tortoises, which could equally walk on land 



