Geology and Mineralogy. 79 



6. Cambria?! or Primordial rocks in the eastern part of Brit- 

 ish Columbia. — Mr. H. H. Winwood describes, in the Geologi- 

 cal Magazine for May, greenish micaceous, more or less calcareous 

 rocks, containing remains of Paradoxides, Conocoryphe, and other 

 allied forms, from a locality near Stephen, on the Canadian Pacific 

 Railway, between the 116th and 117th meridians west of Green- 

 wich. 



7. The folds in the Alps. — The double folds described from 

 the "Alpes Glaronnaises " by M. Heim have been a subject of 

 much discussion, and one of those objecting to them, M. Vacek, 

 has a paper in the Jahrb. der k. k. Geol. Reichsanst., xxxiv, 234, 

 1884. M. Bertrand has a paper bearing on the same subject in 

 the Bull. Soc. Geol. de France, xii, 318, 1884. — Archives Sci. 

 Phys. et Nat., xiii, March 15, 1885. 



8. Disintegration in the Alps. — M. A. Brun, after a micro- 

 scopic study of the rocky crests of the Alps (Echo des Alpes, 

 1884), observes that they are penetrated with small fissures, lep- 

 toclases (joints) or microclases, having directions determined by 

 the dislocations of the rock; that a mountain mass, like the 

 Aiguille du Midi, in the Mt. Blanc chain, is traversed in certain 

 directions by diaclases and paraclases — intersecting fissures, 

 which divide the mountain into gigantic fragments, and were 

 due to the pressures and tensions undergone by the rock since its 

 formation. The microclases give the rock great porosity, per- 

 mitting the absorption of water, which acts by corrosion as well 

 as in other ways. The water charged with lime (from calcareous 

 material in the granite) may contain even three milligrams of silica 

 per liter. — Archives Sci. et Phys. et JSFat., xiii, March 15, 1885. 



9. The Amblypoda ; by E. D. Cope. — The American Naturalist 

 for November and December, 1884, and January, 1885, contains 

 an illustrated memoir by Professor Cope on species of the genera 

 Coryphodon, Bathmodon, Pantolambda, Bathyopsis, Loxolopho- 

 don and Uintatherium. 



10. The Lenape Stone, or the Indian and the Mammoth; by 

 H. C. Mercer. 96 pp. 12mo, with illustrations. New York and 

 London, 1885. (G. P. Putnam's Sons). — This little volume contains 

 a review of the facts in Archaeology bearing esj>ecially on the 

 existence of man with the " Mammoth." The facts are well 

 illustrated and appear to be fairly presented. 



11. United States Geological Survey. — The following publica- 

 tions of the Survey have recently appeared : 



Review of the Fossil Ostreidae of North America and a comparison of the fossil 

 with the living forms, by C. A. White, M.D., with appendices by Prof. A. Heil- 

 prin and Mr. John A. Ryder. From 4th Annual Report of the Director, 1882, 

 1883, "Washington. 



A Geological Reconnoissance in Southern Oregon, by Israel C. Russell. Ibid. 



Bulletin of the Survey No. 10, on the Cambrian Faunas of North America. 56 

 pp., with 10 plates. Washington. 



Bulletin No. 11, on the Quaternary and recent Mollusca of the Great Basin, by 

 R. Ellsworth Call, introduced by a sketch of the Quaternary Lakes of the Great 

 Basin, by G. K. Gilbert. 



