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Baur, Georg. (1) On the origin of the Galapagos Islands. Am. Xat. xxv. 



1891, pp. 217-2-20, ;]07-326. 

 (2) Ein Besucli der Galdpagos-Inseln. Biolog. Centralbl. xii. 1S92, 



pp. 221-250. 

 (3) New observations on the origin of the GaMpagos Islands, with 



remarks on the geological age of the Pacific ocean. Am. Nat. xxxi. 



1897, pp. 6G1-G80, 864-89G (incomplete). 

 Bentham, George. (1) Galapagos Islands. In his Notes on the classifica- 

 tion, history, and geographical distribution of Compositae. Jour. 



Linn. Soc. xiii. 1871-73, pp. 55G-557. 

 Caruel, Theodor. (1) Contribuzione alia flora delle Galapagos. Rendic. 



Acad. Lincei, v. 1889, pp. 619-G25. 

 Darwin, Charles. (1) In Fitz Roy, Narrative of the surveying voyages of 



his majesty's ships Adventure and Beagle, vol. iii. 1839, p. 460. 

 (2) Journal of researches into the natural history and geology of the 



countries visited during the vovage of H. ]\I. S. Beagle round the 



world, under the command of Capt. Fitz Roy, R. N., vol. ii. 181G, 



pp. 138-176. 

 Douglas, David. (1) A sketch of a journey to the northwestern parts of 



the continent of North America, during the years 1824, 5, 6, and 7. 



Comp. Bot. :\lag. ii. 1836, pp. 8G-87. 

 Du Petit Thouars, Abel. (1) Voyage autour du monde sur la fregate 



" La Venus" pendant les annees 1836-1839. Paris, 1840-1849, vol. 



ii. pp. 279-322. 

 Ehrenberg, Christian Gottfried. (1) Das jetzige mikroskopische Siis.s- 



wasserleben der Galapagos-Inseln. Bericht Akad. Bei'lin, 1853, 



pp. 178-179. 

 (2) Die organische IMischung der vulkanischen Gebirgsarten besonders 



des Palagonits auf den Galapagos-Inseln. L. c, pp. 180-182 (with 



unnumbered table). 

 Engler, Adolf. (1) Versuch einer Entwicklungsgeschichte der Pflanzenwelt, 



inbesondere der Florengebiete seit der Tertiiirperiode, ii. 1882, 



p. 180. 

 Hemsley, "William Botting. (1) Report on present state of knowledge of 



various insular floras, being an introduction to the botany of the 



Challenger Expedition. Botany of Challenger, i. 1885, pp. 10, 19. 

 (2) Insular floras. Science Progress, i. 1894, pp. 400-401 ; v. 1896, 



pp. 298-302. 



(3) The flora of the Galapagos Islands. Nature, Iii. 1895, p. 623. 



(4) Cactaceae in the Galapagos Islands. Nature, liii. 1895, pp. 31, 249. 



(5) The Cactaceae of the Galapagos Islands. Gard. Chron. ser. 3, 



xxiv. 1898, p. 265, fig. 75. 



(6) In Hook. Icones Plantarum, xxviii. 1901, t. 2715-2719. 



Hooker, Joseph Dalton. (1) Description of Pleiiropeialum, a new genus of 



VOL. XXXVI II. — 6 



