TABULAR LIST 



OF THE Chief Orders of the Vertebrate Class 

 REPTILES. 



Order 1 Dinosaurs 



,, 2 Crocodiles 



3 Chelonians 



4 Lizards ^ 



, 5 Snakes J 



6 Pterodactyls 



, 7 Theromorphs 



, 8 Plesiosaurs 



, 9 Ichthyosaurs 



Huge extinct creatures, often as 

 big as elephants. 



Crocodiles and Alligators. 



Turtles and Tortoises. 



Closely allied to one another, and 

 having the epiderm moulded 

 to form " scales." 



Extinct : they had great flying 

 wings supported by one finger. 



Extinct : often with teeth resem- 

 bling those of Mammals. 



Extinct : swan-necked aquatic 

 forms, with four joaddles. 



Extinct : short-necked marine 

 forms, closely representing 

 among Reptiles, the Whales 

 and Porpoises of the Mamma- 

 lian series. 



N.B. — This does not profess to he a complete enumeration. 



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