CONTENTS.

Page.

INTRODUCTORY SKETCH OF THE QUATERNARY LAKES OF THE GREAT Basin,
BY G. K. GILBERT...

ON THE QUATERNARY AND RECENT MOLLUSCA OF THE GREAT BASIN, WITH DE-
SCRIPTIONS OF NEW FORMS, BY R. ELLSWORTH CALL........

CHAPTER I.-Systematic catalogue of the recent and Quaternary shells of the
Great Basin...

Introduction..

Catalogue

Lamellibranchiata

Gasteropoda