296 
THE ORIGIN OF VERTEBRATES 
Fig. 118.-SKELETON oF Hxap-Recion or Ammocastes. A, Lareran View; B, 
VENTRAL View; C, DorsaL VIEW. 
Muco-cartilage, ved; soft cartilage, blue; hard cartilage, purple. shy, ska, sks, 
skeletal bars; c.e., position of pineal eye; na. cart., nasal cartilage; ped., pedicle ; 
cr., cranium ; 7¢., notochord. 
