LIFK 



513 



rut lived the invading race, and resumed, in large measure, their 

 former dominance. 



Fig. 434. A Jurassic spookfish or chirmcroid, Squaloraja polyspondyla, X 

 natural si/.o; from the Lower Lias, Dorsetshire. (Restored by A. Smith Wood- 

 ward.) 



- 435- A Jurassic forerunner of the modern Antia, Eugnathtis athostomus, 

 about 1/7 natural size, from the Lower Lias, Dorsetshire. (A. Smith Woodward.) 





Fig. 436. Outline and skeleton of Ichthyosaurus quadriscissus. (After JaekeP 



(9) Some of the reptiles which had taken to the sea in the pre- 

 ci-ding period had become extinct, while others made their first 

 appearance in this period. The ichthyosaurs (fish-like saurians) 

 reached their highest development in this period, and seem to have 

 swum every sea. Their adaptation to aquatic life is shown in the 

 mplete transformation of their limbs into paddles (Fig. 436), in 



