COMPANION VOLUMES OF THIS WORK 



North American Index Fossils 



(Invertebrates) 



By Amadeus W. Grabau, Professor of Palaeontology 

 in Columbia University, and Hervey Woodburn Shi- 

 MER, Assistant Professor of Palaeontology in the Massa- 

 chusetts Institute of Technology. 2 vols. Vol. I, 1909, 

 853 pages and 12 10 text figures; Vol. II, 19 10, 909 

 pages and 727 text figures. 



The volumes contain brief descriptions of the genera 

 and species of North American fossils most important 

 for the determination of geological horizons, and keys 

 for the determination of the genera. They are suitable 

 for class work in Palaeontology, and as an aid to the 

 worker, in determining his fossils and finding his hori- 

 zons. Owing to the widel}' scattered condition of the 

 literature, a comprehensive treatise like the present 

 becomes an indispensable adjunct to the geologist's 

 equipment. The Stratigraphic Appendices, the Glos- 

 sary of Terms, Directions for Collecting and Preserving 

 Fossils, and the extensive bibliography will also prove 

 of great value. 



Large octavo, cloth bound, $12.00 net, for the two 

 volumes. 



In preparation 



Manual of Stratigraphy 



By Professor Amadeus W. Grabau. 

 A discussion of the geological formations, with espe- 

 cial reference to North America and Europe. An appli- 

 cation of ''Principles of Stratigraphy." 



A. G. Seiler & Co., 1224 Amsterdam Ave., New York 



