LIST OF ILLUSTRATIONS. 



PLATES. 



Page 



PI. I. — Skeleton of Speotyto Ct\nicnlaria 118 



PL II. — Osteology of Speotyto CuDiciilaria 118 



PI. III. — Osteology of Speotyto Cunicularia 148 



PL IV. — Osteology of Eremopliila Alpestris 148 



PL V. — Osteology of American Tetraonidse 350 



PL VI. — Osteology of American TetraonidsB 350 



PL VII. — Osteology of American Tetraonidte 350 



PL VIII. — Osteology of American Tetraouida3 350 



PI. IX. — Osteology of American Tetraonidse 350 



PL X. — Osteology of American Tetraonidte 350 



PL XI. — Osteology of American Tetraonidse 350 



PL XIL— Osteology of American Tetraonidte 350 



PL XIII. — Osteology of American TetraonidtB 350 



PL XIV. — Osteology of Lanins Ludovicianus excubitorides ...... 350 



CUTS IN TEXT. 



Fig. — Angles of skull of Eremophila 121 



Fig. — Showing distribution of Vegetation 203 



Fig. — Showing distribution of Vegetation 208 



Fig. — Map of Nevada 256 



Fig. — Map of Florissant, Colorado 300 



Fig. —Fossil Cray-fish 396 



vi 



