IIo ADDITIONS TO THE LIBRARY. 
i cag ea Academy of Natural Sciences. Proceedings, 1883. 
Parts 1-3. 1883-84. 
A. Heilprin. The Ice of the Glacial Period, 46.—E. D. Cope. Ona 
new extinct Genus of Sirenia from South Carolina, 52.—E. D. Cope. 
The Tritubercular Type of Superior Molar Tooth, 56.—A. Heilprin. 
Phenomena of Glaciation, 69.—H. C. Lewis. Cr ystallized Serpentine 
from Delaware, 72.—E. D. Cope. On the Mutual Tela of the Buno- 
therian Mammalia, 7 77.—E. D. Cope. On the Characters of the Skull in 
the Hadrosauride, 97.—E. D. Cope. On some Vertebrata from the 
Permian of Illinois, 108.—E. D. Cope. On the Fishes of the Recent and 
Pliocene Lakes of the Western Part of the Great Basin, and of the 
Idaho Pliocene Lake, 154. —E. D. Cope. On some Fossils of the Puerco 
Formation, 168.—T. Meehan. Some Evidences of Great Modern Geo- 
logical Changes in Alaska, 187.—A. Heilprin. The Synchronism of 
Geological Formations, 197.—A. Heilprin. Note on a Collection of Fossils 
from the Hamilton (Devonian) Group of Pike Co., Pa., 213.—T. D. 
Rand. Notes on the Geology of Chester Valley and Vicinity, 241.— 
J. Willcox. Notes on Glacial Action in Northern New York and 
Canada, 257. 
. — ,1864. Partl. 1884. 
H. C. Lewis. A Phosphor escent Variety of Limestone, 10.—J. Leidy. 
Fossil Bones from Louisiana, 22.—A. Heilprin. On a Carboniferous 
Ammonite from Texas, 53.—O. Meyer. Notes on Tertiary Shells, 104.— 
J. Leidy. Vertebrate Fossils from Florida, 118. 
-——. American Philosophical Society. Proceedings. Vol.xx. Nos. 
112 & 113 (1882). 1883. 
F. A. Genth. Contributions from the Laboratory of the University 
of Pennsylvania, 381—E. D. Cope. The Classification of Ungulate 
Mammalia, 438.—E. D. Cope. Third Contribution to the History of the 
Vertebrata of the Permian Formation of Texas, 447——E. D. Cope. 
Synopsis of the Vertebrata of the Puerco Eocene Epoch, 461.—J. C. 
White. Note on the Geology of West Virginia, 479.—P. Frazer. The 
Horizon of the South V: alley Hill Rocks in Pennsylvania, 510.—E. W. 
Claypole. Geological Notes, 529.—J. P. Lesley. Note on the Progress 
of the Second Geological Survey of Pennsylvania, 5837.—E. D. Cope. 
First Addition to the Fauna of the Puerco Eocene, 545.—E. D. Cope. 
On the Brains of the Eocene Mammalia Phenacodus and Periptychus, 
563.—E. D. Cope. Fourth Contribution to the History of the Permian 
Formation of Texas, 628.—E. W. Claypole: Note on a large Fish-plate 
from the Upper Chemung (?) Beds of Northern Pennsylvania, 664. 
s Vol. =a. | No. 114. 1684 
E. D. Cope. Letter frorn Loup Fork, 216.—E. W. Claypole. The 
Perry County Fault, 218.—E. W. Claypole. On the Equivalent of the 
New York Portage in Perry County, Middle Pennsylvania, 230.—E. W. 
Claypole. Note on the Genus Rensselaeria in the Hamilton Group in 
Perry Co., 235.—E. W. Claypole. Note ona large Crustacean from the 
Catskill Gr oup of Pennsylvania, 236.—L. Lesquereux. Obituary Notice 
of Oswald Heer, 286.—J. P. Lesley and G.H.Horn. Obituary Notices of 
John L. Le Conte, 291,294.—A.T. Lilley. Detailed Section of Chemung 
Rocks exposed in the Gulf Brook Gorge at Le Roy, Bradford County, 
Pennsylvania, 304.—E. D. Cope. On the Distribution of the Loup Fork 
Formation in New Mexico, 308.—E. D. Cope. Second Addition to the 
Knowledge of the Puerco Epoch, 309.—E. D. Cope. On the Trituber- 
culate Type of Molar Teeth in the Mammalia, 324. 
