Earliest Discoveries — Footprints of Batrachians — 

 Labyrinthodents of the Carboniferous — Micro- 

 sauria of the Carboniferous — Other Types — Dis- 

 coveries in Erect Trees — Invertebrate Air- 

 breathers, Land Snails, Millipedes, Insects, Spiders 

 AND Scorpions — General Conclusions 



