13° 



SECRETS OF EARTH AND SEA 



the actual ancestors of those existing to-day. The larger 

 number of them have left no direct issue, but represent side 

 branches of the " tree of life " which have died out ages ago. 



Strangely-shaped Fishes.— I. The Coffer-fish (Ostracion) ; 2. Pteraclis, 

 an oceanic fish allied to the so-called Dolphins ; 3. The Sun-fish 

 (Orthagoriscus) ; 4. An Australian Blenny Patsecus. 



