e, 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 palaeontological 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 palaeontology 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 Palaeontology. 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.

[14] _The Same._ Monograph of the Geometrid Moths or Phalaenidae.
By A. S. PACKARD, Jr., M.D.

--Captain Ludlow's report of his visit to the Yellowstone Park in 1875
is one of the most interesting books the Government has published.[15]
He found that the army of American vandals has turned its footsteps
toward this national museum of wonders, and every year they go to it in
hundreds and thousands to admire and destroy the delicate lace work
which nature has spent centuries in weaving. The Park contains the most
remarkable glaciers on this continent, and the constantly flowing and
splashing water has built up a basin of opal around each fountain.
These basins are curiously convoluted and fretted, and are composed
almost entirely of quartz deposited from the water, their light gray
color contrasting beautifully with the deeply tinted water.