Geology. 769 



1917. — The first of these elegant volumes begins with a portrait 

 and appreciation of the late William Bullock Clark, who during 

 the years from 1896 to 1917 did so much to place the state of 

 Maryland in the front rank among the state geological surveys 

 of our country. The many volumes issued under the directorship 

 of Professor Clark will always remain his monument, attesting 

 to his high standard in scientific work and his inspiration to 

 others. 



Volume ten deals with the geography of Maryland, including 

 also the physiography, natural resources, manufactures, etc. (pp. 

 39-167) . Part II, the larger one, deals fully with the surface and 

 underground water resources of Maryland, including Delaware 

 and the District of Columbia. Part I is by Professor Clark, Part 

 II by the same author assisted by E. B. Mathews and E. W. 

 Berry. The whole is a report that should be of the greatest 

 practical value to the state. 



The physiography, geology, and mineral resources of Anne 

 Arundel County are described at length by Homer P. Little. 

 The volume also contains accounts by others of the soils, climate, 

 hydrography, magnetic declination, and forests. c. s. 



2. The San Lorenzo Series of Middle California; by Bruce 

 L. Clark. Bull. Dept, Geology, University of California, vol. 

 11, No. 2, pp. 45-234, pis. 3-24, 4 text figs., 1918.— This excel- 

 lent memoir describes the stratigraphy and fauna of the Oligo- 

 cene of central western California, and compares it with similar 

 formations of Oregon, "Washington, and British Columbia. The 

 fauna consists of 137 species, of which 70 are described here as 

 new; nearly all are of bivalves and gastropods. 



The presence of Oligocene strata in California was demon- 

 strated by Arnold in 1906, and now they are known to have a 

 wide distribution along the west coast of the United States. 

 From the Miocene, the Oligocene is separated by a time break 

 of apparently long duration, and but 9 per cent of the fauna 

 passes upward, while with the Eocene it is intimately connected. 

 In fact, the author believes that a part of the Oligocene as here 

 defined may include strata that are actually of Upper Eocene 

 age, although no fossils are common to the two series. Not a 

 single species is common to the Atlantic and Pacific borders of 

 North America, and but 2 per cent of the fauna is still living. 



c. s. 



3. ~West Virginia Geological Survey; I. C. White, State 

 Geologist, Morgantown, W. Va. — The following important publi- 

 cations have been recently issued : 



No. 28. Detailed Report on Barbour and Upshur Counties and 

 Western Randolph; by D. B. Reger, with an introductory discus- 

 sion of deep well records, including the Deepest Well in the World, 

 by I. C. White, and a discussion of deep well temperatures by 

 C. E. Van Orstrand. Pp. civ, 867 ; 53 pis., 43 text figs., with 



