258 PROCEEDINGS OF THE AMERICAN ACADEMY. 



U. S. C. G. S. = United States Coast and Geodetic Survey : Washington. 

 U. S. G. S. = United States Geological Survey : Washington. 

 Z. d. G. f. E. = Zeitschrift der Gesellschaft f iir Erdkunde : Berlin. 

 Z. f. E. = Zeitschrift fiir Erdkunde : Berlin. 



Maps. 



Atlas Univ. = Atlas Universel par Vivien de St. Martin : Paris, Hachette & 

 Compagnie. References follow revised numbering of the continuation of the 

 series by Fr. Schrader. 



Attica = Karten von Attika, von E. Curtius und J. A. Kaupert, 1 : 25,000 : Ber- 

 lin, 1881-1897. 



Austr. = K. u. K. militar-geographisches Institut : Austria, 1 : 75,000. 



Belg. = Carte Topographique de la Belgique, 1 : 40.000. 



Brit. Ad. = Charts published by Order of the Lords Comaiissioners of the Admi- 

 ralty : London, various scales. 



C. S. = United States Coast and Geodetic Survey, various scales. 



Deum. = Geiieralstabens Kort over Danniark, 1 : 100,000. 



Elba = Carta Geologica dell' Isola d' Elba, 1 : 25,000; Rome, 1884. 



Eug. = Ordnance Survey of England, 1 : 63,860. 



Fr. = Carte de la France, au Depot general de la Guerre, 1 : 80,000. 



Geol. Eu. = Carte geologique internationale de I'Europe, 1 : 1,600,000. Beyrich 

 und Hanchecorne, Berlin, 1894. 



G. S. = United States Geological Survey, scales, 1 : 62,500, 1 : 125,000. 



Germ. = Karte des deutschen Reiches, K. Preuss. Landes-Aufnahnie, 1 : 100,000. 



HoU. = Topographische en militaire kaarte van het koningrijk Nederlanden, 

 1 : 50,000. 



H. O. = Hydrographic Office, United States Navj', various scales. 



Ireland = Ordnance Survey of Ireland, 1 : 63,360. 



Ital. = Instituto geografico militare : Italy, 1 : 100,000. 



N. J. = Atlas of New Jersey, Geological Survey of New Jersey. 



Nor. = Topografisk Kart over Kongeriget Norge, 1 : 100,000. 



Rus. = Special Map of European Russia, 1 : 420,000. 



Scot. = Ordnance Survey of Scotland, 1 : 63,360. 



Sicily = Carta Geologica dell' Isola di Sicilia, 1 : 100,000. 



Spain = Meniorias de la Comision del Mapa Geologico de Espana. Mapas, 

 1 : 400,000. 



Spain Bol. = Boletin de la Comision del Mapa Geologico de Espana. Mapas, 

 1 : 400,000. 



Stieler = Adolf Stieler's Handatlas, Gotha, Justus Perthes, various scales. 



Swe. = Generalstabens Karta ofver Sverige, 1 : 100,000. 



STve. Geol. = Sveriges Geologiska Undersiikning, 1 : 50,000. 



SawIss = Eidgenossisches Militair Archiv, Switzerland. 



Tunis = Carte topographique de la Tunisie, Service geographique de I'Armee : 

 France, 1 : 60,000. • 



