506 
THE VOYAGE OF H.M.S. CHALLENGER. 
Di'zertas, ileposits off the, 149. 
DiaW', 322, 32.3, 326, 383, 406. 
„ quartziferous, 322. 
Diagrams, o.xplanation of, 415. 
Diallage, 22, 326. 
Diamond Point, beach sand from, 118-119. 
Diatom Ooze, 31, 186, 189, 208-213. 
„ „ analyses of, 21 1-212, 436-437. 
„ „ area of, 213, 248. 
,. „ average composition of, 211. 
,, „ average deptli of, 209, 248. 
,, „ carbonate of lime in, 210-211. 
„ „ Diatoms in, 210. 
„ „ distribution of, 213. 
,, „ fine washings in, 211. 
„ „ mineral particles in, 211. 
„ „ rate of deposition of, 412. 
„ „ siliceous organisms in, 209-210. 
IHatonm rhomhicum, var. oceanica, 210. 
Diatomacea (see Diatoms). 
Diatomite, 209. 
Diatoms, xxi, xxii, xxiii, xxvi, 18, 23, 35-147, 210, 
258, 263, 281-283, 289, 391. 
„ analysis of, 281, 437. 
Dieulafait, M., 372, 373, 412. 
Different types of deep-sea deposits, 189-248. 
Difficulties surrounding the study of deposits, 13. 
Diller, .J. S., 298. 
I)iorite, quartziferous, 163. 
„ schistoid, 163. 
Discoidea, 284. 
Dv<rnrlnna, 34, 154, 162, 165. 
Distinctive characters of continental minerals, 
325-326. 
„ „ volcanic minerals, 319. 
Distribution of Rlue Mud, 233. 
„ Cetiicean bones, 276. 
„ Coral Mud and Sand, 247. 
„ cosmic spherules, 332-333. 
„ Diatom Ooze, 213. 
„ Globigerina Ooze, 222-223. 
„ Green Mud and Sand, 240. 
,, marine dcj)osits, 247-248. 
„ phillipsitc crystals, 405. 
,, ])ho8phatic concretions, 395-397. 
„ Pter(>i>ofl Ooze, 227-228. 
„ pumice, 295. 
„ Hadiolarinn Ooze, 208. 
„ Red Clay, 202-203. 
„ Red .Mud, 236. 
„ sharks’ teeth, 276. 
Distribution of Volcanic Mud and Sand, 244. 
,, volcanoes, 292, 293. 
Dittmar, AY, 29, 272, 371, 431, 432, 456, 462, 468, 
489-495. 
Dolerite, 162, 312. 
Dolomite, 20, 152, 205, 323, 325. 
Doloniitic limestone, 322, 325. 
„ rocks, 325. 
Dolomitisation, incipient, xxviii, 200. 
Dolphin Ridge, 45, 202. 
„ Rise, 150. 
Dolphins, earbones of, 271, 272. 
Donati, V., xix, xx. 
“ Dove,” the, 30. 
Dredge, 7, 8, 9. 
„ anchor, 10 , 11. 
Dredging and sounding arrangements on board the 
Challenger, 12. 
Dredgings, first deep, xv. 
Dreyer, F., 205. 
Duncan, P. M., 184. 
Dung (see Excreta of Echinoderms). 
D’Urville Island, deposits off, 86-87. 
Dust, cosmic, 327. 
„ volcanic, 292. 
Earbones of Cetaceans (see Bones of Cetaceans). 
Earthquake waves, 293. 
Echinoderms, 26, 35, 39, 63, 69, 194, 215, 216, 225, 
230, 244, 253, 254, 265, 289, 380. 
„ excreta of, 101, 103, 107, 131, 173, 254. 
„ fragments of, 34-146. 
„ spines of, 34-146. 
“Egeria,” the, 30, 208, 209, 365, 405. 
Egg-capsules, 343, 362. 
Ehrenberg, C. G., xxi, xxiv, xxv, 213, 382, 387. 
Elba Island, xxi. 
Elevation of sea-bottom, 171. 
Ellis, Captain, xv. 
England, xxii, 384. 
„ deposits between Gibraltar and, 34-37, 148. 
„ „ Cape Verdes and, 60. 
Enstatite, 22, 155, 217, 332. 
Entooliths, 388. 
Eocene marls, xxiv. 
Epidote, 20, 195, 231, 320, 326, 383,384. 
E<|uatorial Current, 178. 
Eratosthenes, xiii. 
“ Erebus,” the, 208. 
Erebus, Movint, xxii. 
Eruptions, subaerial, 292, 293, 299, 314, 318, 406, 408. 
