88 ANIMAL LIFE PAST AND PRESENT. 



Lizards and the modern Whales, and have regarded such 

 resemblances as due to their similar mode of life. The 

 Fish-Lizards may, indeed, be considered to have occupied 

 that place in the Secondary period which is now held 

 by the Whales ; and it is curious to consider why these 

 saurian devastators of the deep should have died out 

 at the close of the Secondary period, to be succeeded 

 during the Tertiary by the mammalian Whales. 



