Geology and Mineralogy. 61 



3. Geological Survey of the State of New York. — The 13th 

 annual report of the State Geologist for the year 1893 appears 

 in two large volumes full of interesting material. Volume I, 

 Geology, (pp. 1-597) contains four valuable papers on the Livonia 

 salt shaft, based upon the investigations of James Hall, D. D. 

 Luther and J. M. Clarke. A shaft, 12x22 feet, was sunk in 

 Livonia, Livingston County, New York, penetrating from the 

 Hamilton rocks outcropping at the surface, 1432 feet to the base 

 of the salt group of the Silurian. Fossils and accurate measure- 

 ments were preserved, so that the section serves to give an accu- 

 rate record of the thickness of each member of the series, and of 

 the exact position, succession and recurrence of the faunas for 

 this portion of the geological scale. The record of the shaft and 

 sequence of rocks was made by Mr. Luther, and the study and 

 report upon the fossils by Mr. Clarke, and the whole furnishes an 

 exceedingly valuable record for the study of the succession and 

 modification of fossil faunas with passage of geological time. 



The second part of this volume contains a number of reports 

 prepared during the construction of the geological map under the 

 supervision of the United States geological survey. These 

 reports are as follows: On the Helderberg limestones, on the 

 geology of Albany and Ulster Counties and on the geology of 

 the Mohawk Valley, by N. H. Darton ; on the economic geology 

 of Albany County, and on the geology of Ulster County, by F. 

 L. Nason ; on the geology of Essex County, by J. F. Kemp ; of 

 Clinton County, by H. P. Cushing ; on the general and economic 

 geology of parts of St. Lawrence and Jefferson Counties, by C 

 F. Smyth, Jr.; on the geology of Cattaraugus and Chautauqua 

 Counties, by F. A. Randall ; and of Chenango County, by J. M. 

 Clarke. Mr. Clarke also contributes a list of publications relat- 

 ing to the geology and paleontology of the State of New York 

 from 1876-1893. 



Volume ii, Paleontology, in addition to an extract from vol. 

 viii, Part 2 of the Paleontology of New York on the Evolution of 

 the genera of the Paleozoic Brachiopoda, contains a paper on 

 Platycnemic Man in New York, by W. H. Sherzer ; also a dis- 

 cussion of the different genera of Fenestellidse, by Geo. B. Simp- 

 son; and, finally, Part II, An Introduction to the study of 

 the Brachiopoda, intended as a hand-book for the use of students, 

 by James Hall, assisted by John M. Clarke. This last work 

 completes a most valuable contribution to Paleontology, and fur- 

 nishes the American student of stratigraphical geology with the 

 means of precise and thorough work which were almost impossible 

 without such a work on these indispensable indicators of the 

 geological horizons of Paleozoic rocks. h. s. w. 



4. Mollusca and Crustacea of the Miocene formation of New 

 Jersey ; by R. P. Whitfield, Monograph XXVI, U. S. Geol. 

 Survey, 1894, 4°, 193 pp., 24 pi. — This monograph, originally 

 prepared for the New Jersey Survey, was finished by the author 

 and transmitted for publication by the late Professor Cook in 



