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I submit herewith the reports of the several field geologists, and for the details of their work refer to them.

The thanks of the Survey are due to the great number of citizens of the State who, by their interest and help, have contributed to the work of the field parties. These favors have been so numerous that it is impossible to make separate mention of them.

To Major J. W. Powell, Director of the United States Geological Survey, this Survey is indebted for many favors, among which may be mentioned permission to make use of the Texas portion of the plates of his new map of the United States, which here appears as our Progress Map.

To Professor T. C. Mendenhall we are indebted for the use of the base-bars used in measuring the base line in Trans-Pecos Texas.

Mr. G. Browne Goode, Assistant Secretary of the Smithsonian Institute, rendered us great assistance by furnishing plans, photographs, and descriptions for the museum cases and their arrangement in the room.

My own thanks are especially due to the different members of the Survey, who, by faithful and earnest work, have made this Report—so full of detail, and covering such an extent of country—a possibility.