320 Scientific Intelligence. 



paper on Carboniferous Cephalopods, by Alpiieus Hyatt, pp. 

 377-474, in which a number of new genera and species are figured 

 and described. 



5. Outline of the Geology and Physical Features of Maryland, 

 with a new geological map of the State and 16 plates; by G. H. 

 Williams and W. B. Clark. 4°, 67 pp. Johns Hopkins Univer- 

 sity Press, Baltimore, 1893 ; price $1.00 — This book is a reprint 

 of the chapters relating to Physical Geography and Geology from 

 the large work on Maryland and its resources, prepared by mem- 

 bers of the Johns Hopkins University faculty for the Columbian 

 Exposition. Its first part deals with topography and climate, 

 and is illustrated by nianjr tables and five colored charts which 

 show the- distribution of temperature and precipitation in each 

 season and throughout the year. The second part is descrip- 

 tive of the geology in each of the three great provinces of 

 Maryland — Coastal Plain, Piedmont Plateau and Mountains — and 

 is followed by an historical review of the sequence of events by 

 which the remarkably complete series of geological formations 

 occurring within the State has been deposited and brought into its 

 present position. This part is embellished by ten full-page plates 

 which exhibit the various types of topography, and by a new 

 geological map in colors on a scale of eight miles to the inch. 

 This map also gives the distribution of soils by Prof. Milton 

 Whitney. G. h. w. 



6. Lehrbuch der Petrographie von Dr. Ferdinand Zirkel, 

 Orel. Professor der Mineralogie und Geognosie an der Univer- 

 sitat, Leipzig. Zweite, ganzlich neu verfasste aufiage. Zweiter 

 Band. 941 pp. 8vo. Leipsic, 1894. (Verlag von Wilhelm En- 

 gelmann.) —The first volume of Prof. Zirkel's excellent Lehrbuch 

 was noticed in the last volume of this Journal. This second 

 volume, Avhicm extends to 941 pages, treats, under the head of 

 Special Petrography, of part of the massive crystalline rocks, and 

 includes those containing alkali-feldspar and quartz; alkali-feld- 

 spar without quartz, nephelite or leucite; alkali-feldspar without 

 quartz, but with nephelite or leucite ; and those of lime-soda feld- 

 spar without nephelite or leucite. The subject will be continued 

 in the third volume. 



7. Geological Survey of Portugal: Description de la Fauna 

 Jurassique du Portugal. Glasse des Cephalopodes, by Paul Chof- 

 fat. 1st series: Ammonites du Lusitanien de la contree deTorres- 

 Vedras. pp. 82, 20 quarto plates, Lisbonne, 1893. — This memoir 

 contains descriptions of species of Cardioceras, Phylloceras, Lyto- 

 ceras, Harpoceras, Ochetoceras, Oppelia, Neumayria, Olcoste- 

 phauus, Perisphinctes, Aspidoceras, Peltoceras, Simoceras, Hop- 

 lites. 



8. TIntersuchungen iiber Fossile Hblzer Schwedens / by H. Con- 

 wentz. pp. 99, 11 quarto plates. K. Schwedischen Acad. Wis- 

 senschaften, Ser. C, No. ]20, Stockholm, 1892, contains descrip- 

 tions of fossil plants from the Halma sandstones, from the drift of 

 Sweden, and comparisons of the latter with the former, the authors 



