INTRODUCTION 



i. ? 



S 2 



Ostracoderms 

 Palaeospondylus 

 Elasmobrancbs 

 Ganoids 

 Teleosts 

 Arthrodira 

 Dipnoi 

 Stegocephals 

 Gymnophiona 

 Urodela 

 Anura 



Theromorphs 

 Plesiosaurs 

 Chelonia 

 Ichthyosaurs 

 Rhynchocephals 

 Dinosaurs 

 Squamata 

 Crocodiles 

 Pterodactyls 

 Birds 



Monotremes 

 Marsupials 

 Edentata 

 Insectivores 

 Chiroptera 

 Rodentia 

 Ungulata 

 Sirenia 

 Cetacea 

 ijj Carnivores 

 Primates 



Table showing the geological distribution of the various groups of vertebrates- 



