INDEX 



Adlachrymal bone, 19 



Amphibia, 9 



Araeoscelis, 6 



Aspidosaurus novomexicanus, 12; pel- 



tatus, 13 

 Baker, Lawrence, 5 

 Brachycnemius dolichomerus, 77 

 Broili, Ferdinand, 48, 53, 85 

 Cacops bone-bed, 4 

 Captorhinus, 68; illinoiensis, 69 

 Case, E. C, 1 

 Casea broilii, 112 

 Caseidae, characters of, in 

 Clear Fork division, 3 

 Clepsydrops, 72; natalis, 73 

 Clepysydropidae, 72 

 Conodectes, 48 

 Cope, E. C, 8 



Coracoid, structure of, 58, 98 

 Cotylosauria, characters of, 15 

 Craddock bone-bed, 5 

 Ctenosaurus rugosus, 135 

 Cummins, W. F., 3 

 Desmospondylus anomalus, 49 

 Diadectes, 16; species, 23 

 Diadectidae, characters of, 16 

 Diasparactus, 34 



Dimetrodon incisivus, 76; navajoicus, 84 

 Diplodocus, 97 

 Dissorophus, 13 

 Double Mountain division, 3 

 Dromopus agilis, 40 

 Elcabrosaurus, 80 

 Eosauravus copei, 44 

 Erpetosuchus kansensis, 32 

 Eryopidae, characters of, 9 

 Eryops, 13; grandis, 10 

 Euchirosaurus, n 

 Gibb, Hugh, 25 

 Huene, F. v., 92 

 Kadaliosaurus, 7 

 Labidosaurus, mandible of, 31 

 Limnoscelidae, characters of, 23 

 Limnoscelis paludis, 23; relationships of, 



47 



Marsh, O. C, 7 



Mesosaurus, in 



Miller, Paul C, 1, 140 



Moodie, R. L., 64 



Mosasauria, evolution of paddles, 45 



New Mexico, Permian of, 7 



Nothodon lentus, 16 



Nothodontidae, 16 



Ophiacodon mirus, 81 



Otocoelus mimeticus, 13 



Pareiasaurus, 47 



Pariotichidae, characters of, 68 



Paroccipital, 116 



Pelycosauria, 70 



Phalangeal formula, 40 



P'atyhystrix rugosus, 135 



Poecilospondylus, 80 



Poliosauridae, characters of, 80 



Poliosaurus, 80 



Postnarial bone, 19 



Prearticular bone, 32 



Proganosauria, relationships of, in 



Propappus, 47 



Reptilia, 15; origin of, 64; tarsus of, 

 primitive, 44 



Schuchert, Charles, 1 



Seymouria baylorensis, 48; relation- 

 ships of, 63 



Seymouriidae, characters of, 48 



Species incertae sedis, 137 



Sphenacodon ferox, 78 



Sphenacodontidae, 72 



Stegocephala, 9 



Stereosternum, in 



Tapinocephalus, 92 



Temnospondyli, characters of, 9 



Temporal arches and vacuities, 92 



Therapsida, 71 



Theromorpha, characters of, 70 



Theropleura retroversa, 82 



Trispondylus texensis, 131 



Varanosaurus acutirostris, 85; breviros- 

 tris, 85; relationships of, 109 



Wichita division, 3 



Zatrachys apicalis, 135 



M5 



