464 REVIEWS 



and the Antilles. The " Sino-Siberian continent" lies between the Urals 

 and the circum-Pacific and Mediterranean geosynclines. The "Australo- 

 Indo-Malgache continent" is bounded on the east by the circum-Pacific 

 geosyncline, on the north by the Mediterranean geosyncline, and on the 

 west by the Mozambique channel. The " Af ricano-Brazilian continent" 

 is spoken of as being astride of the South Atlantic and is bounded on the 

 east by Mozambique, on the north by the Mediterranean, and on the west 

 by the circum-Pacific geosyncline. 



The Mediterranean geosyncline extends from Java and Sumatra 

 across India, the Gulf of Persia, the Mesopotamian depression, southern 

 Europe from the Caucasus to the Pyrennees, and the Mediterranean Sea 

 to the Atlantic. 



The circum-Pacific geosyncline extends from Cape Horn to Behring 

 Strait and New Zealand, including the Antilles. 



J. C. Branner. 



Stanford University, 

 April 12, 1905. 



■Grundziige der Gesteinskunde. Teil II, "Spezielle Gesteinskunde." 

 By Ernst Weinschenk. Freiburg: Herdersche Verlagshand- 

 lung, 1905. Pp. 331, 8vo. 



This work places in printed form a course of lectures given by Professor 

 Weinschenk in the University of Munich, and designed to meet the needs 

 of students already somewhat grounded in the general principles of petrol- 

 ogy brought out in Part I, "Allgemeinen Gesteinskunde," which appeared 

 several years ago. The volume is divided into three parts, treating 

 respectively of the eruptive rocks, the sedimentary rocks, and the crystal- 

 line schists. 



The eruptive rocks are treated in general according to the system of 

 Rosenbush, each of the principal types being discussed in a very systematic 

 manner under the following heads: (1) macroscopic characters; (2) mineral 

 composition and structure; (3) chemical characters, and (4) occurrence 

 and geological age. 



The sedimentary rocks are treated under the usual divisions of mechan- 

 ical, chemical, and organic sediments, and the principal types of rocks 

 under each of these are quite fully discussed. 



About thirty pages are devoted to the crystalline schists, the leading 

 types being treated rather less systematically and in less detail than the 

 .types of eruptive rocks. 



