146 Scientific Intelligence. 



in mathematics as do the treatises of Mallard and de Lapparent, 

 and to show as "simply as possible the methods that the science 

 owes to crystallography, to physics and to chemistry in order to 

 determine and classify minerals." l. v. p. 



5. Recherches Mineralogiques, Edition. Posthume par Prof. M. 

 Tolstopiatow. Moscow, 1893 (Leipsig in commission bei G. 

 Weigand). 8°, pp. 136. 3 col. plates. — This memoir comprises 

 the results, naturally in somewhat incomplete form, of the studies 

 of the author, who was professor of mineralogy at the University 

 of Moscow, in crystallogenesis and the optical and physical prop- 

 erties of crystals and the discussion of certain theories held by 

 him relating to such phenomena. An obituary of the author is 

 also added. l. y. p. 



6. A large tinio-like shell from the Coal measures. — Prof. 

 Whiteaves describes in the Transactions of the Royal Society of 

 Canada (Sect, iv, 1893, pp. 21-24, Pt. I), a large unio-like shell 

 which he names Asthenodonta Westo?ii, discovered in the South 

 Joggins coal field by Mr. T. C. Watson. The dimensions of the 

 largest specimens are 200 mm by 90 mm . 



7. Cretaceous hi Northern Minnesota. — H. V. Winchell reports 

 the discovery of Cretaceous deposits of probable Colorado group 

 age, in the Mesabi range, Section 20, twn. 58 IS"., Range 19 W. 

 (American Geologist, vol. xii, p. 220.) w. 



8. On the evidences of a Submergence of Western Europe and 

 of the Mediterranean Coast, at the close of the Glacial or so- 

 called Post-glacial Period, and immediately preceding the Neo- 

 lithic, or Recent Period ; by Joseph Prestwich, (Phil, trans. 

 Roy. Soc. London, vol. clxxxiv (1893), A. pp. 903-984.) — The 

 paper is illustrated by a map giving the position of the Rubble- 

 drift and Raised Beaches for Europe and Northern Africa. The 

 author believes that the phenomena discussed indicate a tempo- 

 rary submergence beneath deep waters (at least 200 or 300 feet 

 about the shores of the Mediterranean), followed by re-elevation 

 at the close of the Glacial period and commencement of the Neo- 

 lithic age. w. 



9. The Canadian Ice Age, being notes or the Pleistocene 

 Geology of Canada, with special reference to the life of the 

 Period and its climatal conditions, and lists of the specimens in 

 the Museum (Peter Redpath Museum, McGill Unversity, Mon- 

 treal) ; by Sir J. William Dawson". Scientific Publishing Co., 

 New York, pp. 301. — The list of Pleistocene Fossils (chapter vi) 

 has been carefully revised up to date and includes 240 species. 

 The whole of the marine species with two or three exceptions, 

 the author states, are living northern or Arctic forms belonging 

 to moderate depths or varying from the littoral zone to 100 

 fathoms. Nearly all the marine species of the Leda clay and 

 Saxicava sand are still living on the coasts opposite the points 

 where the fossils occur. The shells of the lower bowlder clay 

 and of the more inland and elevated beds, regarded as older than 

 the lower terraces near the coast, are more Arctic in character. 



