66 Scientifie Intelligence. 
Beranioes this district has been considered a poor one for organic 
remains, but the present survey of it has secured a collection of 
nearly 5,000 specimens, which is probably the tor oa collection 
of Paleozoic fossils ever obtained from so limited an area in the 
far West. It is, however, not the number are re cimens nor the 
number of species represented, which Mr. Walcott has determined 
to be 359 (more than a third of them new), that gives greatest 
value to this collection, but the fact that it is a systematic collec- - 
tion in one district, extending through one series of 20,000 feet 
of Paleozoic sediments, included between the _ se of the Middle 
Cambrian and the upper Coal-measure limestone. The Cambrian 
auna embraces 119 species; the Devonian, 144, and the Car- 
boniferous, 83. In the Silurian the fauna is but slightly haat 8 
Sinai "of the Drodacnie of a copper, iron, coud 
collection of these statistics was made ‘i sevion with t 
Census Bureau, and they embody the information obtained pa 
the canvass of 10, 440 mining establishm 
The paper by "Mr. Clarence King o n th e Produetion of the 
Survey. The present ry Roan the same as the one on 
by . H. Holm sigue ae hand Sas lost none of thas ning. 
A doable Sita index of twenty pages effectively sonstuden 
this valuable report. 
2. Third Annual Report of the U. 8S. Geological Survey to 
the Secretary of the Interior, 1881-82. a - W. Powe, 
Director. Washington, 1883. 4to, pp. and 564, with 
XXXYV Plates and Figs. 1 to 56.—A few leanne copies of this 
report have been issued without the complete set of illustrations. 
The volume opens with the Report of the Director, which gives a 
résumé of the work accomplished during the yea rand presents a 
financial statement. Following this are diate re reports by 
Messrs. Clarence ere, ‘Arngld haves, G. K. Gilbert, T. C. Cham- 
berlin, 8. F. Emmons, G. F. Becker, L. F. Wa ‘a: J. Howard Gore 
and Gilbert Thesapson. 
Mr. epee in his report states that he, in connection with Mr. 
