INDEX. 
Cocoanut tree, uses of, 326. 
Coenenchyma, 60. 
Columella, 44, 60. 
Commensalism in polyps, 24, 62. 
Comoro Islands, 350. 
Cook, Captain, on Christmas Island, 
375. 
Cope, E. D., on species of the Anguilla 
caves, 305. 
Cophobelemnon clavatum, 91. 
Corals changed to a phosphate by guano, 
319. 
Corals, rate of growth of, 125, 253, 418. 
temperature limiting, 108, 419. 
influence of impure and fresh wa- 
ters on distribution, 119. 
injured by boring animals, 121. 
Coral, precious, 90. 
Coral heads, 139, 140, 145. 
islands, forms and features, 161. 
submerged, 191, 271. 
poor place for human development, 
332. 
Coral mud and sand of bottom, 142, 
150, 181, 182, 183. 
Coral reefs, rate of growth of, 253. 
benefits from, 159. 
geographical distribution of, 335. 
submarine slopes off reefs, 288. 
forms determined by marine cur- 
rents, 288. 
Coral reef harbors, 160. 
seas, extent of, 336. 
Coral rock, 152, 206, 212, 217, 221, 385. 
solid compact of Metia, 194, 386. 
Coral sands, formation of, 142, 227, 385. 
Coral sand-rocks, 152, 154, 392. 
Corallet, 48, 60. 
Corallide, 90. 
Corallines, 107. 
Corallium from the Sandwich Islands, 91. 
Corallium rubrum, 89. 
Corallum, 42, 48, 60. 
composition of, 98, 105. 
hardness of, 98. 
Corynactics viridis, lasso-cells, 33. 
Coryne, 102. 
Cosmoledo, 350. 
Costz, 160. 
28 
433 
| Couthouy, J. P., on Anthea flagellifera, 
37. 
Crosby, W. O., Cuba elevated reefs, 
Oe 
Ctenactis echinata, 45, 66. 
Cuba, elevated reefs of, 275. 
Currents, as a means of giving atolls 
their features, Guppy, 288, 290. 
A. Agassiz, 288. 
Pacific, 296. 
Cyathophylloids, 21, 78. 
Dati, W. H., Vermetus nigricans on 
Florida shores, 206. 
Dana’s Report on Zodphytes, names of 
species of, 420. 
Danger Island, depths near, 173. 
Darwin, on Coral Reefs, 7, 261. 
depth of reef corals, 115. 
rate of growth of corals, 123. 
origin of coral mud, 231. 
thickness of reefs, 157. 
on soundings, 172. 
on the Maldives, 172, 186, 189, 
268. 
on the Chagos Bank, 192, 270. 
on the Gambier Islands, 157, 265. 
origin of barrier and atoll reefs, 
261. 
geographical distribution of coral 
reefs, 339. 
consolidation of coral sands, 393, 
395. 
objections to theory of, considered, 
Dh 
Dead men’s fingers, 83. 
Dean’s Island, 169, 203, 301, 369. 
Dendrophyllia arborea, 75. 
cornigera, 75. 
nigrescens, 51, 75. 
Depeyster Island, 171, 378. 
Depth of reef-corals, 114, 
Depths near coral reefs, 173, 216, 219, 
288. 
Diego Garcia, 172, 279. 
Diploria cerebriformis, 65, 418. 
Stokesi, 114. 
Disappointment Islands, 172. 
Dissepiments, 60. 
