[11] "_United States Geological and Geographical Survey of the Territories._" F. V. HAYDEN, United States Geologist in charge. Annual Report, 1877. Colorado and adjacent Territories. Government Printing Office.
--We have also received two of the "Miscellaneous Publications"[12] of the survey, one being the last and crowning work of America's great invertebrate palæontologist, Dr. F. B. Meek.[13] The names "Meek and Hayden" have an association in American scientific work that is historic, and in the "Report on Invertebrate, Cretaceous, and Tertiary Fossils of the Upper Missouri Country" are assembled the results of painstaking labors extending through many years. The volume is worthy to stand as a monument to such an author. The introduction contains a description, in the author's characteristically concise style, of the formations in which the fossils were found. The fossils described include all the invertebrates from the prescribed region, and it is indicative of the author's position in regard to palæontological work in America, that nearly all the species were originally described by him. This profound knowledge of the subject and the painstaking attention to the discussion of types, and of their synonomy, make the work, as Dr. Hayden truly says, "one of the most important contributions ever made to the science of palæontology in any portion of the world." Forty-five lithographic plates, by Meek and Swinton, and numerous woodcuts, illustrate the book.
[12] _The Same._ Catalogue of Publications. Second edition, Revised to December 31, 1876.
[13] _The Same._ Report on Invertebrate Palæontology. F. B. MEEK.
--Dr. Packard's "Monograph of the Geometrid Moths"[14] is the next important publication of this survey. It is the first complete treatise on the American species of these moths. The author describes between three and four hundred species, and thinks it not unlikely that nearly a thousand will be ultimately found on the continent. The collections have been made by many travellers, and at points extending from Polaris bay to Texas. Great attention is paid to generic and specific description, and to synonomy, besides which a complete bibliography of the subject is added. Dr. Packard's work is therefore well suited to serve for immediate instruction, as well as a standard for reference. The admirably executed plates increase its value for both uses.