FOSSILIZED WINGS 



•*_-.A'--'3Ct«': 



%^v "'^' 



^^■ 





Fig. 30. — Wings of a Dragon-fly preserved in the ancient lime 

 stone of the Carboniferous period or Coal-bearing rocks. 



preserved in fine sandy limestone of Oolitic age. 

 Here (Fig. 32) we have a jelly-fish preserved ; 



Fig. 31. — Pterotlactylc- skeleton prrscrxcd iti Lit liu^raphic 

 limestone, showing the iinjn-ession of the membrane of tlie 

 wings. 



47 



