HOW THE BACKBONED ANIMALS PASS FROM WATER-BREATHING TO
AIR-BREATHING, AND FIND THEIR WAY OUT UPON THE LAND 70
PICTURE-HEADING--A Carboniferous Forest with ancient Amphibians
(Labyrinthodonts). In the water _Baphetes_; on land
_Dendrerpeton_, _Hylonomus_, and _Hylerpeton_. (Animals
taken from Dawson’s _Air-Breathers of the Coal_.)