PREFACE 
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. Dali, 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 /, 1903. 
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