OUR BEST FEATURES 



parapineal pirteal 



pineal 



pfneat 



'eti/iA 



iem 



6 '' H I 



Fig. 97. Evolution of the Vertebrate Eye as Conceived by 

 Studnicka (from Plate, after Studnicka). 



(From AUgem. Zool., Gustav Fischer.) 

 For details, see pp. xxxvi, xxxvii. 



185 



