REVIEWS 581 
indicates an age older than the Dakota group, and probably equiva- 
lent to the Cenomanian of Europe, and the Lower Tuscaloosa of Ala- 
bama. Part 2 of the bulletin deals with the systematic paleobotany. 
4. This is a descriptive summary of the fish remains known within 
the limits of the state of New Jersey. ; 
5. New Jersey ranks second in the list of states in the value of 
products from the clay industry. In this a decided increase is shown 
over the previous year. The production of iron decreased. Zinc 
mining had a decrease in the amount of ore hoisted, but an increase 
in tonnage separated. AN we: 
The Maxville Limestone. By WitLiAM CLIFFORD Morse. Geol. 
Survey of Ohio, 4th series, Bull. 13. Pp. viiit128; figs. 6; 
pls. 5. 
The Maxville limestone is the top of the Mississippian system in 
Ohio, and has a thickness of about fifty feet. It is underlain by the 
highest member of the Waverly, and is overlain unconformably by the 
Sharon conglomerate, the lowest member of the Pennsylvanian. It 
outcrops between Zanesville and the Ohio River in two well-defined 
areas, separated by a region in which it is completely lacking. This 
bulletin adds twelve species to the Maxville fauna hitherto known. 
A Ste. Genevieve age is indicated with the probabilities that it cor- 
responds to the Ohara member of that formation. In the Appalachian 
region the Greenbrier limestone is the equivalent in age. One chapter 
is devoted to abstracts of the literature on the Maxville, and one chapter 
to the economic uses to which the limestone can be put. Several 
analyses are given. IN a 
Wirt, Roane, and Calhoun Counties. By RAy V. HENNEN. W.Va. 
Geolesunvey. Ep wxxc 572. es. OF pls. 15> maps 2. 
This is one of the series of county reports being published by the 
Survey. It is largely descriptive and covers the history of the area, 
its physiography, general and detailed geology, geologic structure, oil 
and gas fields, coal resources, clays, road materials, building-stones, 
and soils. The detailed geologic contour structure map shows the 
location of the anticlines where the drilling for oil and gas wells would 
be most favorable. The soil survey of these counties is the work of 
W. J. Latimer and F. N. Meeker of the Department of Agriculture. 
The maps are on a scale of about an inch to the mile, and are in a cover 
separate from the text. Noa 1m 
