PREFACE. 



The catalogue herewith presented iiichules tlie types and ficrured 

 specimens in the division of stratigraphic paleontology of the Depart- 

 ment of Geology and such other materials in the division of systematic 

 and applied geology and mineralogy as have been the subject of special 

 investigation and publication. 



In order that this catalogue may be of greatest service to the special- 

 ist, for whom it is primarily designed, the material has been arranged 

 under four heads as below, each section being accompanied by its owu 

 explanatory introduction, as prepared by the officials in charge of the 

 respective divisions. The arrangement, then, is as follows: 



wSection I. Catalogue of the types and figured specimens of fo.ssil inver- 

 tebrates, prepared under the direction of Mr. Charles vSchuchert. 



Section 2. Catalogue of the types, cotypes, and supplemental types of 

 vertebrate fo.ssils, prepared in part under the direction of Air. F. A. 

 Lucas. 



Section 3. Catalogue of the types and illustrated specimens of fo.ssil 

 plants, prepared under the direction of Dr. A. C. Peale. 



Section 4. Lists of minerals, meteorites, and rock and ore collections 

 that have been the subject of special investigation and publication, pre- 

 pared under the direction of the Head Curator and Mr. Wirt Tassin. 



While it can not be claimed that the catalogue is aksolutely com- 

 plete, the changes in the pensonnel of the department incidental" to the 

 withdrawal of Mr. F. A. Lucas and Mr. Charles Schuchert would seem 

 to render its issuance in printed form advi.sable at the present time. 



George P. Merrill, 



Head Curator of Geolo^v. 

 J.\.xuARY I, 1905. 



