PREFACE 



i 



THE present volume, the fourth of the Harriman Alaska 

 Expedition series, contains papers on Geology and Paleon- 

 tology. The Glaciers were treated in volume HI. Study 

 of the fossils brought back by the Expedition has resulted 

 in the discovery of 38 new species and 7 new genera, of 

 which 2 genera and 19 species are invertebrates, and 5 

 genera and 19 species plants. 



Acknowledgments are due the authors of the several 

 papers for the time and labor they have given the subjects 

 entrusted to them. Of these authors, Dr. Dall, Professor 

 Emerson, and Dr. Palache were members of the Expedi- 

 tion. Dr. Ulrich and Dr. Knowlton were not on the Ex- 

 pedition, but have kindly prepared the reports relating to 

 the groups on which they are leading authorities. Ac- 

 knowledgments are due also to the United States Geo- 

 logical Survey and the United States Biological Survey 

 for the use of photographic material for illustrations. 



The editor wishes to express his appreciation of the 

 chapter headpieces, which add so much to the attractive 

 appearance of the volume. The one at the head of the 

 chapter on Fossil Plants was drawn by Mr. F. A. Walpole; 

 all of the others by Mrs. Louise M. Keeler. 



Mr. G. K. Gilbert has kindly relieved me of the edi- 

 torial work necessary in preparing the illustrations and 

 text of this volume for the press, and has written the In- 

 troduction, for which services he has my sincere thanks. 



C. HART MERRIAM, 



Editor. 



WASHINGTON, D. C. 

 May /, /00J. 



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