INDEX 
young cuckoo’s behavior in nest, 
44-46. 
Cyon’s theory, that birds nose their 
way home through the air, 6. 
Dakin, Dr. W. J., on the food of 
the Copepods, 81. 
319 
Dugdale, R. L., his studies on 
“The Jukes,” 294-295. 
Earland, Mr., his investigations on 
shells, 282, 283. 
Earth, the, “preparations” that 
make it fit for a home for 
Darwin, Charles, going forward living creatures, 213-216, 217- 
with, 225-228. 220. 
on brain of the ant, 134. Earthworms, storing instinct in, 
Darwin, Charles, on earthworms, 184. 
184. w= Ebrard, incident of the ants’ 
on heredity, 229. 
on kelp, 93. 
on two Roman snails, 55. 
on water discolored by minute 
floating Alge, 82. 
referred to, 206. 
Darwimism, no recantation of, 224- 
B25. 
Davenport, Dr. C. B., his studies 
on “ rovers,”’ 191-196. 
on “The Jukes,” 295-296, 300- 
gor. 
De Vries, a rediscoverer of Men- 
delian clue, 232. 
his study of mutations and their 
behavior, 240-241. 
Dearborn, Professor, observations 
on his book on joy, 309-315. 
Delage, Professor Yves, his method 
of subjecting ova to chemical 
action, 140. 
Diatoms, 81, 82, 87. 
Differences in degeneration of eyes 
of cave animals, 247-248. 
-——Digger-wasps, 270, 271, 273. 
cocoons reported by, 20. 
Egg, the microcosm of the, 134- 
14. 
Eigenmann, Professor, his study of 
cave-fishes, 250, 252. 
Embryos, dwarf and Siamese-twin, 
141. 
Emery, Professor Carlo, his in- 
vestigations on the European 
Amazon ant, 17-23. 
Estabrook, Dr. Arthur H., his 
sequel to the story of ‘‘ The 
Jukes,” 295, 297-300. 
Eumenes amedei, 207, 208. 
Euphausia, penguins’ food, 13. 
Evening Primrose, mutations of, 
240, 241, 242. 
Evolution, convergence in, 254-262. 
Evolution of the free hand, 288- 
293. 
Experiments on egg-cells, 140-141. 
on homing of sea-swallows, 1-8. 
with ants and bees, 7. 
Ewart, on seeds, 179. 
Dinnet, the moor of, in spring, 1so. ™" Fabre, the late M. Henri, his ob- 
Disease, almost none in wild 
Nature, 302. 
the organism’s efforts to adjust 
itself to environment, 304. 
the seamy side of variability, 307. 
Doflein, 248. 
Duchatel’s hypothesis as to sensi- 
tiveness of retina of bird, 5. 
servations on beetles, 185. 
his observations on wonders of 
instinct, 206-210. 
Fall of the year, 111-119. 
Fall of the leaves, 114-115. 
Fish embryos, experiments on, 250, 
Bgis 
“Floating meadows,” 81-82, 88. 
