LIST OF ILLUSTRATIONS. 



BULLETIN No. 1— SECOND SERIES. 



Anciext euixs in Southwestern Colokado, by W. H. Jackson. 

 Plate I (facing page 32). 



Fig. 1. Ground-plan of round tower on the Eio Mancos. 



Figs. 2, 3. Tower adjoining a rectangular foundation in the canon of the Mancos. 



Fig. 4. A portion of doorway and one corner of a carefully-built house, Mancos 



Canon. 

 Fig. 5. Cliff-house on the rocks of Mancos Canon. 

 Fig. 6. Inscriptions on canon-walls. 

 Plate II (facing page 34). 

 Fig. 7. Cliff-house in Mancos Canon. 

 Fig. 8. Showing the tenacity of cementing-material. 

 Fig. 9. A square tower in the valley of the McElnio. 

 Fig. 10. An isolated rock in the valley of the McElmo covered with ruined houses 



and walls. 

 Fig. 11. Ground-plan of an extended series of houses in the valley of the Hoven- 

 weep. 

 Plate III (facing page 36). 

 Fig. 12. A two-story house in the crevices of the escariiment in the Mancos 



Canon. 

 Fig. 13. A general view of the valley of the Rio Mancos near its outlet from the 



inesa x'erde. 

 Fig. 14. A view of ruined village in the valley of the Hovenweep. 



BULLETIN No. 3— SECOND SERIES. 



Report on the topography of the San Juan country, by Franklin Rhoda. 



View of Mount Sneffels. looking northwest from station 29 (facing page 189). 

 View of the Qnartzite Peaks from station 38, looking east across the great caQon 

 of the Animas (facing page 199). 



Note on some peculiar forms of erosion in Eastern Colorado, with heliotype 

 illustrations, by F. V. Hayden. 



Plate VII (facing page 213). 



Picturesque pine and castellated rocks. 

 Plate nil (facing page 214). 



Profile Rocks, Pleasant Park, Colorado. 



BULLETIN No. 4- SECOND SERIES. 



Notes on the surface-features of the Colorado or Front range of the Rocky 

 Mountains, by F. V. Hayden. 



Plate IX (facing page 220). 



View of the Colorado or Front range, taken from a point near Denver. 

 Plate X (facing page 221). 



View of Pike's Peak group, taken from bluff east of Monument Creek. 



Outlines of a natural arrangement of the Falconid^, by Robert Ridgway. 

 Plate XI (between pages 231 and 232). 



Coracoid apparatus, 11 iignres. 

 Flate XII (between pages 231 and 232). 



Supraniaxillary and nasal bones, 8 figures. 

 Plate XIII (between pages 231 and 232). » 



Superciliary process of the lachrymal, 8 figures. 



