the accumulation of data throwing light on the geological and physical condiditons during the later teritary times, and the probable habitat and   of the preservation of the plants and animals a large number of  and animals.  A large number of        in the subject have been copied and arranged alphabetically for convenience of use.  About 300 pages of manuscript was writeen giving the present geological and physical conditions of the   region of southwestern Montana.



This work was done while waiting for the services of the draftsman to illustrate the biological part of the memoir.  It was found, that this phase of the work would take much time for its completion and that it would be necessary to defer the publication of the results unitl part of the reexamined; So when the draftsman became available the