Geology and Natural History. 117 



6. West Virginia Geological Survey, County Reports, 1913. 

 Cabell, Wayne and Lincoln Counties ; by C. E. Keebs, Assistant 

 Geologist, and D. D. Teets, Jr., Field Assistant. Pp. 483, pis. 

 i-xxvi, 6 figs., 7 maps in separate cover. — In common with the 

 county reports previously published by the West Virginia Sur- 

 vey, the present volume deals chiefly with economic resources, — 

 coal, petroleum, natural gas, structural material, and soils. Nu- 

 merous detailed sections of the Dunkard, Monongahela, Cone- 

 maugh, Allegheny and Pottsville series are given. h. e. g. 



7. West Virginia Geological Survey: Marion, Monongalia, 

 and Taylor Counties,; by Ray V. Hennen, Assistant Geologist, 

 assisted by David B. Reger, Assistant Geologist, 1913. Pp. 

 xvii, 844, pis. I-XXXIII, 11 figures including 2 maps. Report 

 accompanied by 3 maps in separate case showing (I) Topography, 

 (II) General and Economic Geology, (III) Agricultural Soils, of 

 the region reported upon. — The report on Marion, Monongalia, 

 and Taylor Counties covers one of the richest areas in the Appa- 

 lachian region, so far as coal, oil, and gas are concerned. The 

 Pittsburg coal seam here reaches its greatest development. In 

 addition to very detailed areal and economic descriptions the 

 authors devote considerable space to a discussion of the strati- 

 graphy of the Carboniferous. h. e. g. 



8. loioa Geological Survey, Volume XXII, Annotated, Bibli- 

 ography of Iowa Geology and Mining ; by Charles R. Keyes. 

 Pp. 908, 1913. — In addition to an exhaustive descriptive bibliog- 

 raphy of Iowa geology and geography, Dr. Keyes has prepared 

 the following interesting chapters : On geographical exploration 

 of Iowa land (pp. 15-44) ; geologic reconnaissance in Iowa (pp. 

 45-88) ; an historical sketch of mining in Iowa (pp. 89-121), and 

 systematic geologic surveying in Iowa (pp. 123-144). h. e. g. 



9. Permo- Carboniferous Vertebrates from, New Mexico; by 

 E. C. Case, S. W. Williston, and M. G. Mehl. Pp. i, 81 ; one 

 plate, 51 figs. (Carnegie Institution of Washington, Publication 

 No. 181) Washington, 1913. — This highly important contribution 

 to our knowledge of Paleozoic Vertebrata will be read with 

 great interest, as it emanates from the pens of the foremost Amer- 

 ican authorities upon these hitherto obscurely known forms. The 

 work embodies the results of the latest exploration in the South- 

 west which has done much to clarify the obscure stratigraphy of 

 the fossil-bearing beds, and which has added the knowledge based 

 upon whole skeletons where but fragmentary remains were known 

 before. Chapter I, by Case and Williston, describes the bone- 

 bearing beds of north-central New Mexico. The results are 

 summarized as follows: 



"The Upper Trias rocks, about 600 feet in thickness, perhaps 

 more, are predominantly softer and lighter colored, often orange- 

 colored, yellowish, and whitish, and more aeolian in character, 

 with the upper or uppermost beds more or less gypsiferous. 

 These beds, as in the Lander region, have basal sandstones, red- 

 dish or white, with conglomerate and clay layers below them 



