CONTENTS 



Introduction i 



Cacops Bone-Bed •. 4 



Craddock Bone-Bed S 



Permian of New Mexico 7 



Class Amphibia; Subclass Stegocephala 9 



Order Temnospondyli 9 



Family Eryopidae 9 



Eryops grandis 10 



Aspidosaurus novomexicanus 12 



Aspidosaurus peltatus 13 



Class Reptilia 15 



Order Cotylosauria 15 



Family Diadectidae 16 



Nothodon lentus 16 



Diadectes, species 23 



Family Limnoscelidae 23 



Limnoscelis paludis 23 



Family Seymouriidae . . , 48 



Seymouria baylorensis 48 



Family Pariotichidae » 68 



Captorhinus, species 68 



Captorhinus illinoiensis 69 



Order Theromorpha 70 



Family Sphenacodontidae 72 



Clepsydrops 72 



Clepsydrops natalis 73 



Naosaurus, species 75 



Sphenacodon ferox 78 



Family Poliosauridae 80 



Ophiacodon mirus 81 



Varanosaurus brevirostris 85 



Family Caseidae iii 



Casea broilii 112 



Trispondylus texensis 131 



Genus incertae sedis 135 



Platyhystrix rugosus ; -135 



Species incertae sedis 137 



Explanation or Plates 140 



Index 145 



Plates I-XXXVIII 



