EXTINCT ANIMALS 



and other carnivorous reptiles of that remote 

 Triassic age. So we see the co-existence of blood- 

 sucker and victim — of the destructive oppressor 

 and the helpless oppressed — forced on our 

 attention in these two locahties, Russia and 



Fig. 162. — Photograph of another skull of Inostraiisevia. 



South Africa, when we stud}^ the immensely 

 remote past of the Triassic age. 



We leave now these great extinct land-dwell- 

 ing reptiles and take a glance at representatives 

 of two extinct orders of huge aquatic creatures 

 which must also be classified as reptiles. These 

 are the Plesiosauria and the Ichthyosauria. 

 Though some of them must have measured 

 thirty feet from snout to tail, they do not equal 



222 



