70 BOMBAY DUCKS 
animals which have found this little earth too small for 
them; to the mighty flying reptiles the expanse of 
whose leathery wings measured thirty feet, and which, 
had they lived in these days, would have been capable 
of flying off with a bullock; to the great sloth-like 
creatures—megatherium, glyptodon, and mylodon— 
whose height was three times that of a tall man and 
twice that of the average elephant; to the huge hairy 
mammoths; to the giant mastodons, whose tusks were 
twelve feet in length; to the enormous lizards which 
were large enough to swallow a sheep at a gulp; to the 
moa, once “the lord of the great Polynesian islands of 
New Zealand.” 
When we contemplate such extinct monsters which 
must be numbered among the unfit, the words “sur- 
vival of the fittest” acquire a new significance. 
