58 Geology 



compared in tabular arrangement with that of Williams and Wade, and all are 

 referred to the corresponding Chinese ideographs. 



Volume II treats of the same material as Volume I, but from the standpoint of 

 systematic continental history. Repetition has been avoided so far as is consistent 

 with the general subject. The subject-matter of this volume is classified primarily 

 according to geologic eras of periods, and secondarily by broad areas, of which 

 China proper is the central region. Each chapter treats of the geographic condition 

 of southeastern Asia during a particular age, and the successive chapters trace the 

 sequence of changes from age to age. Only the great events of continental history 

 are distinguishable on the basis of existing knowledge, but they suffice to show 

 that the present continent is an aggregation of land masses which, from time to 

 time, have been forced into union with one another. This study of Asia has been 

 carried on with comparative studies of North America and Europe, and has led 

 to theoretical views regarding continental structure and development which have 

 a broad application. They are briefly stated in a closing chapter. 



Volume III contains the description and illustration of the Paleozoic fossils 

 collected by the expedition, of which the greater portion are Cambrian in age. 

 The section devoted to the Cambrian, written by Dr. Walcott, includes the descrip- 

 tion and correlation of fossils collected by Prof. J. P. Iddings on Tschang-hsing- 

 tau Island, Manchuria, and treats of the development of our knowledge concern- 

 ing the geology and paleontology of the Cambrian formations of China. Each of 

 the localities is described in detail, with lists of included species and notes indicat- 

 ing their position in the general lists of species accompanying the discussion of the 

 stratigraphy in Volume I ; the vertical and cross sections given in that volume are 

 redrawn, showing the locality numbers in their proper positions ; and the f aunal 

 horizons are correlated with each other and, so far as possible, with those of other 

 countries. The volume also contains an important report by Prof. Stuart Weller 

 on the Ordovician fossils collected in eastern Asia in 1903-4, accompanied by two 

 plates. These fossils include two collections, one from the province of Shan-tung 

 and the other from the extreme eastern portion of the province of Ssi-ch'uan. 



Dr. George H. Girty has contributed to the volume a report on Upper Paleozoic 

 fossils collected in China 1903-4, together with three plates. The specimens were 

 obtained from localities quite widely separated, and Dr. Girty's discussion of the 

 collections is a valuable contribution to the geologic history of the region. 



No. 192. HUNTINGTON, ELLSWORTH, with contributions by CHARLES SCHUCHERT, 

 A. E. DOUGLASS, and CHARLES J. KULLMER. The Climatic Factor, as 

 Illustrated in Arid America. Quarto. (For full description, see 

 page 131.) 



Other papers relating to geology are the publications of the Geophysical Labo- 

 ratory, Nos. 31, 157, and 158; see under Chemistry and Physics, pages 43 and 44. 

 Also Nos. 182, 213, and 291 under Zoology, pages 133 to 150 contain papers of a 

 geological character. 



