EEPOET ON THE DEEP-SEA DEPOSITS. 
499 
“Argus,” the, 30. 
Aristotle, xiii, xvi. 
Arkose, 127, 158, 323. 
Arrou Islands, deposits betvreen Banda and, 94-97, 
170-171. 
,, deposits between Cape York and, 
92-95, 170. 
Ascension Island, deposits between St. Vincent and, 
146-147, 160. 
,, ,, deposits between Tristan da Cunha 
and, 142-145, 159. 
„ ,, deposits off, 144-147, 159. 
Aschemonella, 41, 51. 
Ascidians, 81, 162, 194, 346, 350. 
Ashes, bparitic, 319. 
„ tracbytic, 313. 
,, volcanic, xxiv, 195, 196, 294, 299, 312, 
314-318, 358, 359, 363, 405, 408. 
Asteroidea, 194. 
Asteromphalus darwinii, 210. 
,, forma huchii, 210. 
,, forma cuvierii, 210. 
„ forma denarius, 210. 
,, forma, huniboldtii, 2\Q. 
„ liookerii, 210. 
AstrorMza, 71, 137, 139. 
Astrorhizidse, 35-147, 193, 206, 289. 
Atataa Island, 166. 
Atlanta cunicula, 224. 
,, depressa, 224. 
,, fusca, 224. 
,, gaudichaudii, 224. 
,, gihhosa, 224. 
,. helicinoides, 224 
„ indinata, 224. 
„ ivflata, 224. 
,, involuta, 224. 
„ lesueurii, 224. 
,, mediterranea, 224.- 
,, peronii, 224. 
„ primitia, 224. 
,, quoyana, 224. 
,, rosea, 224. 
„ souleyeti, 224. 
„ tesselata, 224. 
„ turrieulata, 224. 
,, violacea, 224. 
Atlantic cable, xv. 
„ mud, xxvii. 
,, Ocean, xiii, xv, xvi, xxiii, xxiv, xxv, xxvi. 
,, ,, deposits in, 148-160. 
Atlantic Ocean, manganese in deposits of, 341-343, 
365. 
„ ooze, xxvii. 
„ Sea, xvi. 
Atlantis, xvi. 
Atmospheric precipitations, 334, 335. 
Atolls, soil of coral, 294. 
Audouin, J. V., xxii. 
Augite, 22, 217, 226, 231, 238, 24.3, 296, 297, .300, 
301, 304, 310, 312, 316, 317, 318, 319, 
320, 322, 326, 374. 
,, porpbyritic, 313. 
Augitic andesite, 194, 300, 311, 313, 348. 
Australia, deposits between Heard Island and, 
163-164. 
„ deposits between New Zealand and, 166. 
,, deposits off, 165. 
,, Great Barrier Eeef of, 386. 
Auvergne, 406. 
Average composition of Blue Mud, 232. 
„ „ Coral Mud, 246. 
„ ,, Coral Sand, 246. 
„ „ Diatom Ooze, 211. 
„ „ Globigerina Ooze, 218. 
„ ,, Green Mud, 238, 
,, ,, Green Sand, 239. 
„ ., Pteropod Ooze, 226. 
,, ,, Eadiolarian Ooze, 206. 
,, ,, Eed Clay, 197. 
,, ,, Eed Mud, 235. 
,, ,, Volcanic Mud, 242. 
,, ,, Volcanic Sand, 243. 
Average depth of Blue Mud, 230, 248. 
„ „ Coral Mud, 244, 248. 
„ „ Coral Sand, 246, 248. 
,, ,, Diatom Ooze, 209, 248. 
,, „ Globigerina Ooze, 214-215, 2 48. 
„ ,, Green Mud, 237, 248. 
„ „ Green Sand, 239, 248. 
„ ,, Pteropod Ooze, 225, 248. 
,, „ Eadiolarian Ooze, 206, 248. 
„ „ Eed Clay, 190, 248. 
„ „ Eed Mud, 234, 248. 
„ „ various types of deposits, 280. 
,, „ Volcanic Mud, 241, 248. 
„ ,, Volcanic Sand, 242, 248. 
Average percentage of carbonate of lime in deposits, 280. 
Azores Islands, deposits between Bermuda and, 54-59, 
152-153. 
„ deposits between Madeira and, 58-61, 
153. 
