DONS. 7 KOYEMBRE-19 DÉCEMBRE Î881. 
27 
Lesley. — Objections to the récent âge of the Virginia fauîts, 155. 
Me Creath. — Anaiysis of a pure dolomite from Franklin county, 197. 
White. — Notes on the place of the Sharon conglomerate in the palceozoïc sé- 
ries, 498. 
Spencer. — Discovery of the preglacial outlet of the basin of Lake Erie into 
tbat of Lake Ontario and notes on the origin of our lower great lakes, 300. 
Ashburner. — Geological section at Saint-Mary's, Elk county» 337. 
Fontaine. ^ SaltviUe fault explaincd, 349. 
Transactions of the—, Nouvelle série, t. XV, N* 3, 188Î. 
Washington. Smithsonian contributions to knowledge, t. XXIIÏ, 
1881. 
E. "W. Hilgard. — On the geology of lower Louisiana and the Sait dôposit of 
Petite Anse Island. 
^ Smithsonian mîscellaneous collections, t. XVIII, 1880. 
— Id., t. XIX, 1880. 
Dali. — Postpliocene fossils in the coast range of California, 3. — Fossil mol- 
lusks from later Tertiaries of California, 10. — Distribution of Californian ter- 
tiary fossils, 26. 
Id., t. XX, 1881. 
Gale. — Geology of the lignite formation. 
Gilbert. — The âge of the Tonto sandstone. 
Gille. — The structure and shape of Palœotherium, 
Meek. — The discovery of new species of fossil plants. 
Fowell. — Geology of the valley of the Colorado. 
Dali. — Remarks on the mammoths of Alaska and Siberia. 
Datton. — Remarks on the geology of the Colorado région. 
Meek. — Descriptions of new species of fossil plants from Al!egha,n^ Co ; Virgi- 
nia. 
Duton. — On the geological character of the Colorado river. — On the succes- 
sion of volcanic éruptions. — On the Permian formation of North America. 
^ Powell. — Remarks on the Permian and other geological formations. 
— Id., t. XXI, 1881. 
— U. S. Geological Survey. First annual report ofthe — , 1880. 
— U. S. Geological and geographical survey of the territories. 
Bulletin ofthe —, t. YI, N° 2, 1881. 
S. H. Scudder. — The tertiary lake Basin of Florissant, Colorado, belween 
South and Hayden parks, 279. 
Cope. — Rewiew of the Fv^odentia of the miocène période of North America ; 
361. 
Packard. — On a Gray-Fish from the Lower tertiary beds of Western Wyo- 
ming, 391. 
Grande-Bretagne, Londres. Geological Magazine (the), New 
séries, décade II, t. VIII, 12, Déc. 1881. 
H. Woodward. — Contributions to fossil Crustacea, 529. 
Lamplugh. — The Bridlington and Dimlington shell-béds, 535. 
