62 Scientific Intelligence. 
are to be two atlases, one topographical and one geological. 
Volume III, and Part I of volume IV have recently been published. 
Vol. II. Geology, 682 pp. 4to, with maps, sketches and sec- 
tions. The geological reports, on pirtierte of California, Nevada, 
Utah, Colorado, New Mexico and Arizona, making up this vol- 
ume, are a record of good work and of valuable results. Two 0 
the reports a - by G. K. Gilbert, and one each by A. R. Marvine, 
E. E. Howell, J. J. Stevenson and Oscar Loew. Part of the 
observations ea sparen of Mr. Gilbert are brought out in an 
volume. They cover the sabpoets of orology, erosion, glacial 
ocecgeeet voleanic rocks, and tke stratified rocks. All the 
reports, and especially Mr. Gilbert’s, throw much light on the 
characters and dynamics of displaced and folded rocks,—a subject 
which the prevailing absence of soil and forest makes easy of in- 
vestigation. The volume is illustrated ot several fine plates of — 
scenery along the valleys illustrating erosion, and one a case of 
: rain-sculpture ” exemplifying admirably the origin of mountain 
orms. 
Mr. Loew’s report discusses the agricultural resources and soil 
of the regions examined in Colorado, New Mexico, and Arizona, 
gives analyses and descriptions of mineral waters and minerals, 
and describes the eruptive rocks. 
Vol. IV. Paleontology, Part I. Report_on the Invertebrate 
Fossils collected in portions of Nevada, Utah, Colorado, New 
Mexico and Arizona, ee the expeditions of 1871- 1874, by ‘OA 
White, M.D., 220 pp. 4to, 1876.—After some general observations 
on the collections and the periods they represent, Professor White 
takes up the description ot the fossils in the order of the beat 
tions, and illustrates the large number of species Ait twenty-on' 
well-filled quarto plates. The fossils belong to > Primordial 
Canadian and Trenton periods of the Lower Siturian ; a few species 
to the Devonian; nearly half of all to the Carboniferous age, some 
of them Subcarboniferous, but the larger part of the Coal period ; 
and described ba Acrotreta igs White, Zrematis pannulus 
White, Hyolithes primordial, P47), Agnostus intestrictus 
White, Conocoryphe Kingit M te leben Wheeleri Meek, 
Olene 0 Gilberti Meek, 0. Howelli Meck.—The beds of the 
eri n period (Quebec ne afforded him twelve species, 
m o . ont 
alus ? flagricau ee hite. Fo ur species of ich hg are men- 
tioned from the Trenton “Wella: G. pristi is? and G. quadrimucro- 
natus? of Hall, G. ramul us White, and G, its bees bie” 
Utah, from Pioche in Nevada, and from Ophir City, Ocaierh 
Sorelle in Utah; the Quebec fossils are from Fish Spring in House 
Range, and from Schellbourne and Queen Spring Hill in Schell 
