dons. — 3 nov. 1873 - 5 janv. 1874. 
26 
Scheerer. — Ueber die Genesis der Granulite, mit besonderer Beziehung auf die 
sæchsische Granulit-Formation, 673. 
Eug. Geinitz. — Yersteinerungen aus dem Brandschiefer der unteren Dyas von 
Weissig bei Pillnitz in Sachsen, 691. 
Briefvvechsel : Pichler, 612 ; Dana, 629 ; Stoliczka, 629 ; Ida von Boxberg, 630 ; 
Cohen, 718 ; von Drasche, 722 ; Kenngott, 725 ; Stelzner, 726, 744 ; Eck, 746. 
Alsace-Lorraine. Mulhouse. Société industrielle de —. Bulletin de 
la —, t. XLI1I, août-sept. 1873. 
Espagne. Madrid. Revista minera, t. XXIV, n os 562 à 565 ; 1873. 
Etats-Unis. Boston. — Society of Natural history. Memoirs ot‘ the 
—, t. Il, 2 e partie, n 03 2 et 3. 
Scudder. — On the carboniferous Myriapods preserved in the sigillarian stumps o 
Nova Scotia, 231. 
— — Proceedings of the —, t. XIY, feuilles 15-27 ; 1871. 
J. B. Meader. — On the minerai resources of Utah, 341. 
Hyatt. — On the embryology and development of the shells of the Àmmonoids and 
Nautiloids. 396. 
— Id., t. XY, part. 1 et 2 ; 1872. 
Hvatt. — The non-reversionary Sériés of the Liparoceratidæ, and Remarks upon 
the Sériés of the allied family Dactyloidæ, 4. 
Perry. — Hints towards the post-tertiary History of New-Engîand, from personal 
study of the Rocks, with Strictures on Dana ’s Geology of the New-Haven région, 48. 
Hartt. — On his recent explorations of the eastern part of the Basin of the Ama- 
zonas. 152. 
Cambridge. American Academy of Arts and Sciences. Memoirs of 
the —, 2 e série, t. IX, part. 2; 1873. 
-- Proceedings of the —, t. Ylli, f. 52-63 ; 1872. 
Madison. Wisconsin Academy of Sciences, Arts and Letters, 1870- 
72. 
Eaton. — Report on the Geology of the région about Devil’s Lake, 124. 
Irving. — On the Age of the Quartzites, Schists and Conglomérâtes of Sauk 
County, 129. 
Knapp. — Ancient lakes of Wisconsin, 151. 
Wright. — On the Minerai well at Waterloo, Wis., 154. 
New-Haven. The American Journal of Science and Arts, 3 e série, 
t. Y1 (CYI), nos 35 e t 36 ; 1873. 
J. D. Dana. — On rocks of the Helderberg era, in thé valley of the Connecticut, 339. 
Stevens. — On glaciers of the Glacial era in Virginia, 371. 
Fontaine. —Notes on the West Virginia Asphaltum deposit, 409. 
Comstock. — On the Geology of Western Wyoming, 426. 
Lesquereux. — Age of the Rocky Mountain Coal or Lignitic Formation, 441. 
Saint-Louis. Academy of Science. The Transactions of the —, t. III, 
n° 1 ; 1873. 
Gage. — On the occurence of Iron Ores in Missouri, 181. 
