\ 
, A ^ ^ 
‘se'T, 
CONTENTS. 
PART I. 
ART. I.—Urnatella gracilis, a Fresh-water Polyzoan. By Joseph Leidy, M. D. (Plate I) . 
ART. II.— The Terrestrial Mollusca Inhabitieg the Society Islands. By Andrew J. Garrett. 
(Plates II and III)‘' ^ f 
ART. III. —The Tertiary Geology of the Eastern and Southern United States. y ro . 
Angelo Heilprin. (Plate 
PART II. 
ART. IV. — On some New and Little Known Creodonts. By W. B. Scott. (Plates V, VI 
and 
art. V. — On the Structure and Classification of the Mesozoic Mammalia. By Henry Fair- 
child Osborn. (Plates VIII and IX)** 
155 
186 
PART III. 
ART. V^I. — ^A Memoir Upon the Genus Palieosyops Liedy and Its Allies. By Charles Earle. 
(Plates X, XI, XII, XIII and XI V)" 
ART. VII. — A Study of the Fossil Avifauna of the Equus Beds of the Oregon Desert. By 
R. W. Shufeldt, M.D. (Plates XV, XVI and XVII)’ 389 
PART IV. 
ART. VIII. — New and Little Known Palaeozoic and Mesozoic Fishes. By E. D. Cope. (Plates 
XVIII, XIX and XX)** 427 
ART. IX. — On Cyphornis, an Extinct Genus of Birds. By E. D. Cope.’* 449 
ART. X. — Extinct Bovidre, Canidie and Felidae from Pleistocene of the Plains. By E. D. 
Cope. (Plates XXI and XXII)”> 4511 
ART. XI. — The Structure and Relationship of Ancodus. By W. B. Scott. ( Plates XXIII 
and XXIV)” 461 
ART. XII. — The Osteology of Hyienodon. By W. B. Scott.” 499 
Extra copies 
Extra copies 
Extra copies 
Extra copies 
Extra copies 
Extra copies 
Extra copies 
printed in 
printed in 
printed ii 
printed ii 
printed i: 
printed i: 
printed i: 
advance for tlie Authors, 
advance for the Author, October 10, 1887. 
advance for the Author, July 25, 1888. 
advance for the Author, October 14, 1892. 
advance for the Author, October 20, 1892. 
advance for the Author, May 31, 1894. 
advance for the Author, April 6, 1895. 
