Brandt, Dr., on Hyalonema, 423.
Brisinga coronata, 67, 118; B. endeca-
cnemos, 66, 99, 118; description of, by
Absjörnsen, P. Chr., 68.

Brissopsis lyrifera, 118, 457, 459.
Brooke, J. M., U.S.N., sounding appa-
ratus, 21, 211, 213.
Browning, Lieutenant, 83.
Buccinopsis striata, 464.

Buchanan, John Young, M.A., on the
Carbonic Acid contained in Sea-water,
518, 521.

Buff, Professor Henry, on ocean cur-
rents, 368; on the Gulf-stream, 389.

C.

Calver, Captain, skill in conducting
dredging operations, 83; serial sound-
ings, 309.

Calveria hystrix, 156, 459; C. fenestrata,
159, 182, 459.

Caprella spinosissima, 126.
Carpenter, Dr. William B., F.R.S., 3;
Preliminary Report of the Dredging
Operations in the Lightning,' 133;
Temperature Observations in the Me-
diterranean, 326; Theory of Ocean
Currents, 368, 369; Observations on
the currents in the Strait of Gibraltar,
373; on the Gulf-stream, 390.
Carpenter, W. Lant, B.A., B.Sc., 85;
Analysis of Sea-water, 498, 502-511.
Caryophyllia borealis, 27, 431.
Ceratocyathus ornatus, 431.
Cerithium granosum, 463.

Chalk, 409; analysis of, 469.

Chimmo, W., Commander R.N., 230;
temperatures of the Atlantic, 359.
Choanites, 494.

Chondrocladia virgata, 187.

Cidaris papillata, 76; C. hystrix, 116,
193, 459; C. affinis, 193, 457, 459.
Cladorhiza abyssicola, 112.
Coccoliths, 413.
Coccospheres, 414.
Colosphæra tubifex, 485.

Coralline Zone, 16.
Crinoidea, 434.

Croll, James, on ocean currents, 376,
381.

D.

Dacrydium vitreum, 465.

Darwin, Charles, M.A., F.R.S., 'Origin
of Species,' 8.

D'Aubuisson, on deep-sea temperatures,
360.

Davis, Captain, R.N., testing thermo-
meters, 290, 295.
Dayman, Joseph,

Commander RN.,
23, 229, 302; temperatures of the
Atlantic, 359.

6

Deep-sea Sounding, 205; cup-lead, 210;
Brooke's deep-sea sounding apparatus,
211, 213; the Bulldog' sounding-
machine, 215; the Fitzgerald' sound-
ing machine. 217; the 'Hydra' sound-
ing-machine, 218; donkey-engine, 221
;
derricks, 221; the "accumulator,
222; observed rate of descent of the
sounding instrument, 223; Massey's
sounding-machine, 225.

Deep-sea Temperature, doctrine of, 35;
distribution of heat in the sea, 36;
cold wall, 37; minimum temperature
of the sea, 38; proximity of warm
and cold areas, 131; great uniformity
of temperature at all depths in the
Mediterranean, 191, 285; serial
soundings for temperature, 309–325.
Depth of the Sea, 1; first successful

dredgings at great depths, 3; animal
forms found at depths of from 70 to 1,200
fathoms, 27; animal life abundant at
the bottom of the sea, 31; average
depth of the sea, 31; absolute stillness
at great depths, 37; penetration of
light, 45; abundance of the genera
Astropecten and Archaster, 121.
Despretz, M., researches on the maxi-
mum density of saline solutions, 35;
temperature of greatest density of sea-
water, 307.

Dorynchus thomsoni, 174.

Dredging Apparatus: Müller's dredge,
239; Ball's dredge, 240; deep-sea
dredges, 246; derrick, 247; accumu-
lator, 247; Aunt Sallies, 249; dredge-
rope, 249; dredging in shallow water,
244, 245; dredging in deep water,
253; hempen tangles, 256, 257; empty-
îng the dredge, 259; dredging-sieves,
260.

Dredging Committee, members of, 265;
Belfast Dredging Committee, 266.
Dredging Operations, on the coast of Ire-
land, 266; of England, 266; of Shet-
land and the Hebrides, 266; of Por-
tugal and the Mediterranean, 267; of
the North-east Atlantic, 267; of Nor-
way, Sweden, and Denmark, 268; of

Findlay, A. G., on the Gulf-stream, 390.
Fishes, new species of, 130.
Flabellum distinctum, 432.

Florida, fauna of the Strait of, 171.
Foraminifera, 115, 166, 415, 478.
Forbes, David, F.R.S., analysis of the
white chalk of Shoreham, 469; of the
Folkestone grey chalk, 469; on speci-
mens of Atlantic mud, 514-518.
Forbes, Edward, F.R.S., 4; on the dis-
tribution of marine forms, 6; on the
immutability of species, 6; specific
centres of distribution, 7; the law of
representation, 8, 13; zones of depth,
15; representative forms, 17; inverted
analogy between the distribution of
the fauna and flora of the land and of
the sea, 44; on dredging, 266.
Fossil Echinidæ, 162.

Frankland, Dr., F. R.S., analysis of sea-
water, 511-513.
Fusus sarsi, 464.

Hall, Marshall, F.G.S., cruise of the
'Norna,' 279.

Herschel, Sir John F. W., the doctrine
of a constant temperature of 4° C. at
great depths, 35; letter to Dr. Car-
penter, 378; description of the Gulf-
stream, 381.

Hexactinellidæ, 70, 416.
Holothuria ecalcarea, 125.

Holtenia carpenteri, 71; wide distribu-
tion of, 75, 101, 167, 417, 427.
Humboldt, Baron von, on deep-sea tem-
peratures, 360.

Hunter, John, M. A., F. C.S., 85; analysis
of sea-water, 497.

Huxley, Professor T. H., Sec. R.S., on life
at great depths, 23; on the chalk-mud
of the Atlantic, 496.

Hyalonema, 73, 101, 167, 276, 417, 422,
428; H. lusitanicum, 420, 421; H.
sieboldi, 422.

Hymenaster pellucidus, 120.

I.

Inskip, Staff-Commander, 83.

Isthmus of Panama, Echinoderm Fauna
on the two sides of, 13.

J.

Jeffreys, J. Gwyn, F.R.S., distribution
of marine mollusca, 40; first cruise of
the 'Porcupine,' 84; dredging off the
south coast of Ireland, 121; fourth
cruise of the 'Porcupine,' 178, 267,
278, 418, 428; temperature observa-
tions, 325.

Jenkin, Professor Fleeming, C.E., F.R.S.,

cable between Sardinia and Bona, 26;
first absolute proof of the existence of
highly-organized animals at depths of
upwards of 1,000 fathoms, 30.

K.

Kent, W. Saville, F. L.S., the 'Norna'
expedition, 75, 279; on Askonema setu-
balense, 429.

Kophobelemmon mülleri, 75.
Korethraster hispidus, 119.

L.

Laminarian Zone, 15.
Latirus albus, 464.

Laughton, J. K., M.A., on ocean cur-
rents, 398.

Lee, Lieutenant, U.S. N., deep-sea sound-
ings, 229, 392.

'Lightning,' cruise of the, 57; the Faroe
Banks, 60; the Faroe Islands, 61;
Thorshavn, 61; first attempt at dredg-

M'Clintock, Admiral Sir Leopold, voyage
of the Bulldog,' 24.

Maury, M. F., LL.D., Captain U.S.N.,
23; theory of ocean currents, 368; on
the Gulf-stream, 383.

May, Staff-Commander, cruise of the
'Lightning,' 57, 304.

Mean annual temperatures: Hebrides,
362; Labrador, 362; Bergen, 363
Tobolsk, 363; Faroe Islands, 363
Falkland Islands, 363; Dublin, 363;
Port Famine, 363; Halifax, 363; Bos-
ton, 363.

Ophiothrix lütkeni, 100.

Orbitolites tenuissimus, 91, 194.
Orbulina universa, 23.

P.

Pecten hoskynsi, 465.
Pedicellaster typicus, 456.

Pentacrinus wyville-thomsoni, 186, 443;
P. asteria, 436; P. P. Mülleri, 442.
Petermann, Dr., on the Gulf-stream, 287,
379, 392.

Pheronema anna, 418.

Phormosoma placenta, 171, 459.
Phosphorescence, 98, 148.

Pierce, Professor, on the Gulf-stream,
386.

Platydia anomioides, 146.
Pleuronectia lucida, 464, 465.
Polycystina, 98.

'Porcupine,' first cruise of the, 82; equip-
ment of the vessel, 83; results of the
first dredging, 86; first trial of the
Miller-Casella thermometers, 88; Por-
cupine Bank, 88; trip to Rockall, 89;
second cruise, 93; dredging at the
depth of 2,435 fathoms, 95; return to
Belfast, 100; third cruise, 101; Holte-
nia ground, 104; the hempen tangles,
105; Thorshavn, 106; discovery of
Arctic stream, 110; Shetland plateau,
111; predominance of the Arctic fauna,
131: fauna of the warm area off the
north coast of Scotland, 177; return
to Belfast, 178; fourth cruise of the
'Porcupine,' 179; cruise in the Medi-
terranean, 19); fauna near the African
coast, 192; Adventure Bank, 192;
Malta, 194; temperature soundings
near Stromboli, 195; return to Cowes,
196.

Porocidaris purpurata, 102, 459.
Pourtales, Count L. F. de, deep-sea dredg-

ings across the Gulf-stream off the coast
of Florida, 277.

Pourtalesia jffreysi, 103, 457, 459, 489;
P. phiale, 90, 459.
Predominance of protozoa, 47.
Preservation of specimens, 261.
Pressure, conditions of, at great depths,
32; methods of testing the actual pres-
sure, 34; effect of pressure on the
thermometer, 294.

Prestwich, Joseph, F.R.S., President of
the Geological Society: Temperatures
of the Atlantic, 358; on the continuity
of the chalk, 496.

Psammechinus microtuberculatus, 457; P.
miliaris, 459.

Psolus squamatus, 125.

Pteraster militaris, 171.

R.

Rhabdammina abyssorum, 75.

Rhizocrinus loffotensis, 76, 124, 447, 451.