\ 



TAlMJi OF CONTENTS 



I" AGES 



Title-page and Taljlc of Contents ..... i-iv 



List of Plates ......... v 



List of illustrations in te.\t ....... vi-vii 



Corrigenda ......... vii 



Editorials 1-7,251-255,343-346,501-504 



I. The Crayfish of Allegheny County, Pa. By K. V>. Wil- 

 liamson . . . . . . . . 8-13 



II. A Preliminary List of the \'ascular Flora of Allegheny 



County, Pa. By John A. Shafer . . . .14-127 



III. Some New and Little Known Fossil \"ertebrates. By J. 



B. Hatcher 128-144 



1\'. The Reptiles of. Allegheny County, Pa. By D. A. At- 

 kinson ......... 145-157 



V. Osteology of the Herodiones. By Dr. \V. R. Shufeldt . 158-249 

 VI. On the Cranial Elements and the Deciduous and Perma- 

 nent Dentitions of Titanotherium. By J. B. Hatcher. 256-262 

 \'ll. Sal)al Rigida : A New Species of Palm from the Laramie. 



By J. B. Hatcher . 263-264 



^'III. Supplement to Dr. John Hamilton's List of the Coleoptera 



of Southwestern Pennsylvania. By Henry Klages . 265-294 

 IX. Osteology of the Flamingoes. By Dr. R. W. Shufeldt . 295-324 

 X. Description of a New Species of Baena (B. Hatcheri) from 



the Laramie Beds of Wyoming. By O. P. Hay . 325-326 

 XL The Jurassic Dinosaur Deposits near Canyon City, Colo- 

 rado. By J. B. Hatcher 327-341 



XII. A Mounted Skeleton (jf Titanotherium dispar Marsh. By 



J. B. Hatcher 347-355 



XIII. Structure of the Fore Liml) and Manus of Brontosaurus. 



By J. B. Hatcher 356-376 



Xl\'. The Genera and Species of the Trachodontida? (Hadro- 



sauridae, Claosaurida;) Marsh. By J. B. Hatcher . 377-386 



XV. Some New Pennsylvanian Thorns. By W. W. Ashe . 387-398 



XVI. Osteology of the Psittaci. By R. W. Shufeldt, M.D. . 399-421 



X\'I I. An Annotated Catalogue of the Shells of the Genus Partula 



in the Hartman Collection in the Carnegie Museum. 



By Herbert H. Smith 422-485 



H 3^2. 



