Beport of the Librarian. 
li 
-Beitrag zur Lossfrage. 
-Zur Frage der Oberfiachengestaltung im G-ebiete der 
baltischen Seenplatte. 
-(with Salisbury, R. D.) Neue Beobachtungeu uber 
Quartarbildungen der Magdeburger Borde. 
Walcott, C. D. Second Contribution to the Studies on the 
Cambrian Faunas of North America. 
-Correlation Papers—Cambrian. 
—-Preliminary Notes on the Discovery of a Vertebrate 
Fauna in Silurian (Ordovician) Strata. 
-The Value of the Term “Hudson River Group'’ in Geo¬ 
logic Nomenclature. 
-The Utica Slate and Related Formations; Fossils of the 
Utica Slate and Metamorphoses of Triarthrus Becki. 
-The Permian and other Paleozoic Groups of the Kanab 
Valley, Arizona. 
-Preliminary Notice of the Discovery of the Remains of 
the Natatory and Branchial Appendages of Trilobites. 
-Notes on Some Sections of Trilobites, from the Trenton 
Limestone, and Descriptions of New Species of Fossils. 
-The Trilobite; New and Old Evidence Relating to its 
Organization. 
-Description of a New Genus of the Order Eurypterida 
from the Utica Slate. 
r-Paleozoic Notes; New Genus of Cambrian Trilobites, 
Mesonacis. 
-Classification of the Cambrian System of North America. 
-Note on the Genus Archeocyathus of Billings. 
- : The Taconic System. 
-Cambrian Age of the Roofing Slates of Granville, Wash¬ 
ington Co., New York. 
-Fauna of the “Upper Taconic” of Emmons, in Washing¬ 
ton County, New York. 
-Discovery of Fossils in the Lower Taconic of Emmons. 
-The Taconic System of Emmons, and the Use of the Name 
Taconic in Geologic Nomenclature. 
-Cambrian Fossils from Mount Stephens, Northwest Terri¬ 
tory of Canada. 
