■ REVIEWS 287 



from Carman's careful paper that the earlier views were the more nearly- 

 correct, and that the earlier authors took views of the value of the features 

 in question more nearly proportionate to their intrinsic importance. 

 Carman seems, therefore, to have performed a distinct service in con- 

 tributing to the restoration of a more judicious, as well as more judicial, 

 evaluation of the field evidence of the region and of the views that may 

 be best entertained respecting it. C. 



Textbook of Paleontology. Edited by Charles R. Eastman. 

 Adapted from the German of Karl A. von Zittel. 2d ed. 

 Vol. I. 



Since the appearance of the first edition of Eastman's Zittel in 1900, 

 this work has been the standard textbook of invertebrate paleontology 

 in all American colleges and universities, and this new edition will be 

 welcomed enthusiastically by all teachers and students of the subject. 

 In the preparation of the present edition, as was also the case with the 

 earlier one, the editor has had the collaboration of many of the leading 

 American specialists in the field of invertebrate paleontology, as well as 

 several European investigators. The work is not a translation of the 

 latest German edition of Zittel; the several chapters have been thoroughly 

 revised or entirely rewritten, bringing the matter up to date in a most 

 satisfactory manner. Were it not that the same illustrations are used 

 for the most part in both the German and the American editions, large 

 portions of the volume would scarcely be suspected of having any rela- 

 tion whatsoever with the original Zittel, although the scope and general 

 treatment is modeled after the well-known German textbook. 



It is not worth while, in this place, to enter upon a discussion of the 

 details of the changes in classification, and the additions which have 

 been incorporated in this edition, but the wonderful progress in our 

 knowledge of the extinct invertebrates which has gone forward since the 

 beginning of the century is all reflected in this book. 



S. W. 



Petroleum and Natural Gas in Oklahoma. By L. C. Snider. Pp. 

 196, figs. 37, pis. 4. Oklahoma City, 1913. 

 This book is intended to give to those interested a comprehensive 

 review of the petroleum and natural gas industry in Oklahoma. Methods 

 of prospecting are briefly outlined, the geology of the state is described 

 with special reference to favorable points for the accumulation of oil, 



