BIBLIOGRAPHY 463 



RUTHVEN, ALEX. G. " Faunal Affinities of the Prairie Region of 

 North America." American Naturalist, Vol. XLII., pp. 388 393. 

 1908. 



RUTHVEN, ALEX. G. " Variations and Genetic Relationships of the 

 Garter Snakes." Bull. Smithsonian Institution. U.S. Nat. Mus. 

 No. 61. 1908. 



RYDBERG, P. A. " Composition of the Rocky Mountain Flora." 

 Science (N. S.), Vol. XII., pp. 870873. 1900. 



SALVIN, 0. " On the Avifauna of the Galapagos Archipelago." 

 Trans. Zool. Soc. London, Vol. IX., pp. 447510. 1877. 



SALVIN, C. and F. D. GODMAN. " Aves Centrali-Americanae." 

 4 Vols. London, 18791904. 



SARASIN, F. "Uber die Geschichte der Tierwelt von Ceylon." 

 Zool. Jahrbucher (System. Suppl. 12, Part I.). 1910. 



SARASIN, F. "Die Fauna der Galapagos Inseln." Verhandl. d. 

 Schweizer. Naturf. Gesellschaft 93 Jahresvers, Vol. I., pp. 292294. 

 1910. 



SCHARFF, R. F. " Etude sur les mammiferes de la region holarc- 

 tique et leurs relations avec des regions voisines." Mem. de la Soc. 

 Zool. de France, Vol. VIII., pp. 436474. 1895. , 



SCHARFF, R. F. "The History of the European Fauna." London, 

 1899. 



SCHARFF, R. F. "Some Remarks on the Atlantis Problem." Proc. 

 R. Irish Acad., Vol. XXIV. (Sect. B.), pp. 268302. 1903. 



SCHARFF, R. F., G. COFFEY and others. " The Exploration of the 

 Caves of Kesh, Co. Sligo." Trans. R. Irish Acad. (Se.ct. B.), 

 Vol. XXXII., Part IV., pp. 171214. 1903. 



SCHARFF, R. F. " European Animals : their Geological History 

 and Geographical Distribution." London, 1907. 



SCHARFF, R. F. " On an early Tertiary Land-connection between 

 North and South America." American Naturalist, Vol. XLVIII., 

 pp. 513531. 1909. 



SCHARFF, R. F. " On the Evidences of a Former Land-bridge 

 between Northern Europe and North America." Proc. R. Irish 

 Academy, Vol. XXVIII. (Sect. B.), pp. 128. 1909. 



SCHLOSSER, M. " Tiber die Beziehungen der ausgestorbenen Sa'uge- 

 tierfaunen und ihr Verhaltniss zur Saugetierfauna der Gegenwart." 

 Biologisches Centralblatt, Vol. VIII., pp. 582631. 1888. 



SCHLOSSER, M. " Uber Tullberg's System d. Nagethiere nebst 

 Bermerkungen iiber die fossil en Nager & die wiihrend d. Tertiars 

 existirenden Landverbindungen." Centralbl. f. Mineralogie. Geol. 

 & Palaeont., pp. 705713 und 737748. 1902. 



SCHMIDT, P. " Uber die Verbreitung d. Fische im Nordl. Stillen 

 Ocean & die damit zusammenhangenden zoogeogr. Probleme." 

 Comptes rendus 6me Congres Int. Zoologie, Berne, pp. 561 572. 

 1904. 



SCHUCHERT, C. " Paleogeography of North America." Bull. Geol. 

 Soc. of America, Vol. XX., pp. 427606. 1910. 



