Fig. 1

Vertebrate forelimb homology diagram (from Lull 1947). a Salamander. b Ichthyosaur. c Dolphin. d Pterosaur. e Bird. f Bat
Vertebrate forelimb homology diagram (from Lull 1947). a Salamander. b Ichthyosaur. c Dolphin. d Pterosaur. e Bird. f Bat