XVr LIST OF ILLUSTRATIONS. 



Page. 



Callonotacris lophophora. Dorsal outline of head and pronotum of female type. 131 



Zoniopoda mimicula . Lateral view of type 132 



Zoniopoda mimicula . Dorsal outline of head and pronotum 133 



Oxyhleptella pulchella. Lateral view of female type 137 



Oxybleptella pulchella . Dorsal outline of head and pronotum of male 138 



Oxyhleptella pulchella. Dorsal outline of head and pronotum of female 138 



Inusia bonitensis. Lateral view of type 140 



Inusia bonitensis . Dorsal outline of head and pronotum of type 140 



Mastusia koebelei. Dorsal view of female type 143 



Mastusia koebelei. Lateral outline of head and pronotum of female type 143 



Paraleuas J'rater . Lateral view of the female type 145 



Faraleuas f rater . Dorsal outline of head and pronotum of female type 145 



Jodacrisfurcillata. Lateral view of male type 147 



Jodacris furcillata . Dorsal outline of apex of male abdomen 148 



Leptomerinthoprora sequalis. Lateral view of type 150 



Leptomerinthoprora sequalis. Dorsal outline of head and pronotum of 'type 151 



Alachsero poles rostratus. Lateral view of male type 153 



Machieropoles rostratus. Dorsal outline of head and pronotum of male type. . . 153 



Homxilosaparus sordidatus. Lateral view of male type 155 



Homxilosaparus sordidatus. Dorsal outline of head and pronotum of male 156 



Parascopas chapadensis. Lateral view of male type 160 



Parascopas chapadensis. Dorsal view of apex of male abdomen 160 



Argyrosomus eriensis 165 



Argyrosomus huronius 168 



Argyrosovius zenithicus 170 



Ancinus depressus 175 



Ancinus depressus. Maxilliped 176 



Ancinus depressus. Mandible 176 



Ancinus depressus. First pair of legs of female 176 



Ancinus depressus. First and second pleopod 176 



Ancinus depressus. Third pleopod 176 



Ancinus depressus. Fourth pleopod 177 



Ancinus depressus. Fifth pleopod. Outer branch 177 



Ancinus depressus. Fifth pleopod. Inner branch 177 



Toxochelys stenopora. Plastron. Entoplastron; epiplastron; hyoplastron; 



hypoplastron ; xiphiplastron 193 



Chisternonf inter positum. Part of carapace. First costal plate; third costal 

 plate; neural plate; first neural plate; fourth neural plate; first peripheral ; 



preneural bone 194 



Chisternonf interpositum. Part of plastron. Entoplastron; epiplastron; hyo- 

 plastron; hypoplastron; mesoplastron ; fifth peripheral 195 



Map of Quarry 13 200 



Skull of Camptosaurus. Seen from the left side 205 



Skull of Camptosaurus . Seen from the top 205 



Posterior view of occipital region of skull of Camptosaurus dispar Marsh 207 



Lateral view of posterior portion of skull of Camptosaurus dispar Marsh 210 



Outline of left premaxillary of Camptosaurus medium Marsh 214 



Lateral view of left maxillary of Camptosaurus 215 



External view of left dentary, Camptosaurus 219 



Tenth upper tooth; fifth lower tooth of Camptosaurus medius Marsh 222 



Internal view of right dentary, Camptosaurus disparf Marsh 223 



Axis and portion of atlas of Canptosaurus dispar Marsh 226 



