INDEX. 



441 



Fl8hcB, canoid, now confined to frceh- 

 wator, 107. 

 electric orirans of, ItC). 

 ganoid, living in frcHli-wntcr, 302. 

 of Boutlicrn licminplu're, 'H'>. 

 Flight, powers of, liow acquired, 17.5. 

 P'liiit tools, provini; antiquity of man, 31. 

 Florida, pi^'s of, 89. 



FlowerH, flrutiure of, in relation to 

 crosfin}:. 95. 

 of composita; and umbellifene, 146. 

 beauty of, 195. 

 double, 2*27. 

 Flyech formation, destitute of organic re- 



niaiuB, 273. 

 Forbcp, Mr. D.. on glacial action in the 

 Andes. iU:i. 

 E., on colors of shells, l.'Jft. 

 on abrupt range of bliella in depth, 



lot. 



on jioomess of palcontological col- 

 lections, 273. 

 on coutiuuous succession of genera, 



29S. 

 on ronfinental extension. 330. 

 on distribution during Glacial period, 



:W7. 

 on parallelism in time and spnce, 370. 

 Forests, chanires In. in America, 80. 

 Formatiim, Devonian, 311. 



Cambrian with monocotyledonous 

 plant, 201. 

 Formations, Ihirkness of, in Britain, 271. 



intermittent, 280. 

 Formica ntfesceiis, 212. 

 sanguinea, 213. 

 flava, neuter of, 220. 

 Forms, lowly organized, long-enduring, 



124. 

 Frena, ovi^crons. of cirripedea. 183. 

 Fresh-water productions, dispersal of, 



351. 

 Fries, on species and large genera being 



clbsely allied to other species, 60. 

 Frigate-bird, 178. 

 Frogs on islands. .S.W. 

 Fruit-trees, gradual improvement of, -15. 

 in United States, SO. 

 varieties of, acclimatized in United 

 States, 110. 

 Fuci, crossed, 219. 

 Fur, thicker in cold climates, 1.38. 

 Furze, 395. 



Oalapasos Archipclaco. birds of, 30C. 



productions of, 302, .304. 

 Galeopitliccus, 174. * 



tiame, increase of. checked by vermin. 7.'. 

 tiiirtner, on sterility of hyhrills, 2.3.5, 210. 



on reciprocal crosses. 212. 



on crossed maize and verbasrnm. 2.50. 



ou com|)arison of hybrids and mon- 

 trrels, 2(il. 

 Oaudrj-, Prof., on Intermediato genera of 



rossil mammals. :i0s. 

 Geese, fertility when crossed, 2.39. 



upland. 177. 

 fSeikle, Mr., on subaTrial deiindation,269. 

 3encalogy important in claselflcation, ii?0. 



Generations, alternate, 304. 



GeolTrov St.-llilaire, on balancement, 110. 



on nonioloL'ODs organs, 391. 



Isidore, on variability of repeated 

 parts, 151. 



on correlation, in monstrosities, 20. 



on correlation, 147. 

 GeoflVoy .st.-llilaire, Isidore, on variable 



parts being oltcn monstrous, 155. 

 Geographical distribution, 322. 

 Geograpliy, ancii'iit, 4;i5. 

 Geology, future iirogrees of, 435. 



imperfection of the record, 200. 

 GiraflTc, tail of, 191. 

 Glacial period. 3.37. 



aflfecling the North and South, 450. 

 Gmelin, on dii^tribution, .337. 

 Godwin-Austen. Mr., ou the Malay Archi- 

 pelago, 284. 

 Goethe, on compensation of growth, 142 

 Gomphia. 131. 

 Gooseberry, grafts of. 245. 

 Gould, Dr. Aug. A., on land-shells, 301. 



Mr., on colors of birds. l:}8. 



on instincts of cuckoo, 211. 



on distribution of genera of birds, .300. 

 Gourds, crossed, 250. 

 Graba, on the Uria lacrymans, 94. 

 Grafts, capacity of, 245. 

 Granite, areas of denuded, 277. 

 Grasses, varieties of, 112. 

 Gray, Dr. Asa, on the variability of oaks, 

 00. 



on man not causing variability, 81. 



on sexes of the holly, 97. 



on trees of United States, 101. 



ou naturalized plants in the United 

 States. 113. 



on wstivation. 130. 



on rarity of intermediale varieties, 

 170. 



on Alpine plants. 337. 



Dr. J. E., on stripeil mule, 10;5. 

 Grebe, 177. 



CJroups, aberrant, .387. 

 Grouse, colors of, 88. 



red, a doubtful species. 58. 

 Growth, compensation of, 149. 

 Giiuther, Dr., on the lishcs of Panama, 323. 



Haast. Dr., on glaciers of New Zealand, 



:i42. 

 nabit. effect of. nnder domestication, 25. 

 effect of. under nature. 13!). 

 diversitled, of same species, 17.5. 

 Iliickel, Prof., on classiflcation and the 



lines of descent, :«)0. 

 Tlairand teeth, correlated. 147. 

 llarcourt, Mr. E. V.,on birds of Madeira, 



:J57. 

 IlartunL'. M., on bowlders in the Azores, 



3;i5. 

 Hazel-nuts. .3.31. 



Hearne, on habits of bears, 170. 

 Ili-ath. clmntes in veL't'lation, 77. 

 lleer Oswald, on ancient cultivated plant.s 



80. 

 on plants of Madeira, 100. 

 Ileliiuithemum, 131. 



