24 



ANLMALS OF THE PAST 



sibly be eaten out of existence but for the ftict 

 that they are covered — some of them very 

 completely — with plate - armor that enables 

 them to defy their enemies, or renders them 

 such poor eating as not to be worth the taking. 



Fig. 4. — Cephalaspis and Loricaria, an Ancient and a 

 Modern Annored Fish. 



The arrangement of the plates or scales in the 

 living Loricaria is very suggestive of the series 

 of bony rings covering the body of the ancient 

 Cephalaspis, only the latter, so far as we know, 

 had no side-fins; but the creatures are in no 



