From introduction: "Biological survey of northern California from the Madeline Plains to the Pacific Ocean and from the Oregon boundary to Lassen Butte and parts of the Sierra, with Mount Shasta occupying a nearly central position."

Revision of genus Zapus based upon a study of more than 900 specimens, including nomenclature and skull and teeth figures.

Brief description of the Tres Marías Islands, Mexico, including mammals, birds, reptiles, crustacea, and plants found there.

A bibliographic list which catalogs the researches among the Carboniferous faunas of North America.

A catalogue of the Cretaceous and Tertiary plants of North America.

A report which contains a biography and examines the fossil Foraminifera of America.

A report that contains the records of all the shocks observed or felt on Mount Hamilton and all those reported to the Lick Observatory by letter, as well as newspaper reports of such earthquakes.

This report was prepared with 29 specimens of rock which are described in this report.

From letter of transmittal: SIR: I beg to transmit herewith, for publication as a bulletin, a gazetteer of Kansas.

A report which discusses the specific classification, stratigraphic occurrence, and relationships of one particular group of the many kinds of fossil oysters occurring in the Lower Cretaceous formations of Texas.

From introduction: The field relationships of the rocks described in the following paper were studied during the summers of 1895 and 1896, while I was engaged in geologically mapping portions of the Sonora and Big Trees quadrangles, under the direction of Mr. H. W. Turner.

Classification of more than 3,000 bats to enable correct specimen identification based upon material contained in the collection of the Biological Survey of the U.S. Department of Agriculture.

A report which provides information about the analysis of rocks, minerals, ores, waters, sediments, coals, metals, and many more.

A paper containing both a bibliography and index. It shows the examined publications which each pertain to either paleontology, mineralogy, petrology, and geology.

A report about 2,053 brachiopods which are described or identified in this paper.

Revision of the genera and subgenera of voles and lemmings with comparison between North American and European.

Classification of the one ferret and 22 weasel species and subspecies, with 11 described for the first time.

From introduction: In December, 1892, as the result of field work on the part of Dr. G. H. Williams in the northern and of the writer in the southern portion of South Mountain, there appeared a preliminary description of two of the rock types, in which their identification as ancient volcanics was announced. In this bulletin it is proposed to substantiate that identification with more detailed proof. It is further proposed to show that these ancient igneous rocks were, at the time of their consolidation, identical in character with their recent volcanic analogues, and that their present differences are due to subsequent changes, chief among which has been devitrification. It is also proposed to recognize these facts in the nomenclature.

A report about waters of the Coastal Plain region of the Atlantic Slope. Most of the waterways are of bad quality in the Coastal Plain. It discusses the hygiene of various waterways of the region.

A bibliography which records papers pertaining to North American geology, paleontology, petrology, and mineralogy published in the year 1894.

A report which presents a record of publications on North American geology, paleontology, petrology, and mineralogy for the year 1895.

A bibliography of information about various clays, kaolins, and the ceramic arts.

From introduction: In his report on the Geology of Pennsylvania,' Professor Lesley summarizes his opinion upon the geology of the South Mountains and Formation No. 1. In this, Formation No. 1 is referred to the Upper Cambrian, and a detailed description is given of its occurrence along the South Mountains and across the State to the Delaware. The superjacent limestone, No. 2, is referred to the Ordovician.' Fuller reference will be made to Professor Lesley's descriptions in speaking of the rocks of York County.

A bibliography of geologic literature published in North America, and such literature on North America wherever published. It contains publications from 1732 to those received prior to the close of 1891.