298 DK. J. W. HESLOP HARRISON ON 



LiNDLEY — Rosarnin Monographia, or a Botanical History of 

 Roses. London, 1820. 



Lull — Organic Evolution. 



LuNDSTROM — " Kastriringsforsok med Rosa-former." Svensk. 



Bot. Tidskr., Bd. 3, pp. (i5^-(i6), 1909. 

 Morgan — Physical Basis of Heredity. Philadelphia and 



London, 1919. 

 RosTRUP — " Flora of the Faroe Lslands." Dansk. Bot. 



Tidsskrift, Vol. IV., pp. 5-109, 1S70. 



S'i'ANDLSH — " What is happening to the Hawthorns ?'' J^ourn. 

 Hered., Vol. 7, pp. 266-279, 1916. 



Strassburger — '• Die Apogamie der Eualchemillen und 

 allgemeine Gesichtspunkte, die sich aus ihr 

 ergeben." 'J^ahrb. tvissen. Bot., 1904. 



Smith — Flora Britannica. London, 1804. 



Templeton — " Rosa hibernica.'' Trans. Dub. Soc, Series 2, 

 Vol. IIL, pp. 162-164, 1803. 



Towers — Evolution in Chrysomelid Beetles of the Genus 

 Leptinotarsa. Washington, 1906. 



Whitman — Orthogenetic Eiwlution in Pigeons: Posthiimotis 

 JVorhs of Charles Otis IVhitmau. Edited by O. 

 Riddle. Washington, 1919. 



Woods — " A Synopsis of the British Species of Rosai' 

 Trans. Linn. Soc, Vol. XIL, p. 159, 1818. 



Woolley-Dod — A List of British Roses. London, 191 1. 



