REPOET ON THE DEEP-SEA DEPOSITS. 
75 
Residue. 
Additional Observations. 
1 
Siliceous Organisms. 
Minerals. 
Fine Washings. 
There was nothing in the sounding tube to indicate the 
nature of the bottom. The dredge came up empty and 
without any marks or material to indicate the nature 
of the deposit. 
)0 %), Radiolaria, Sponge 
picules, Diatoms. 
(I'OO %), m. di. 0'07 mm., 
angular ; quartz, felspar, 
magnetite. 
(62'78%), amorphous matter, 
many very minute mineral 
particles, fragments of 
Diatoms. 
The quartz grains in some cases are rounded, and about 1 
mm. in diameter. The pelagic Foraminifera are much 
broken, and composed entirely of the dwarfed, heavy, 
and thick-shelled forms ; there is no great variety. 
The bottom-living forms are very rare ; there are a few 
macroscopic fragments of Polyzoa. 
■0 %), Radiolaria, Sponge 
licules, Diatoms. 
(2-00 %), m. di. 0'07 mm., 
rounded and angular ; quartz, 
orthoclase, hornblende, augite, 
tourmaline, magnetite, grains 
of manganese. 
(70'78 %), amorphous matter, 
with many minute mineral 
particles and fragments of 
siliceous spicules. 
The pelagic Foraminifera are fragmentary ; the bottom- 
living forms are very rare. Several of the quartz 
grains are rounded and have a diameter of 1 mm. 
0 %), Radiolaria, Sponge 
jicules, AstrorhizidiE, Lituo- 
dae. Diatoms. 
(8'00 %), m. di. 0'07 mm., 
angular ; quartz, glauconite, 
plagioclase, augite, horn- 
blende, magnetite. 
(43 '85 %), amorphous matter 
and very fine mineral particles. 
Some of the bottom-living Foraminifera are macroscopic. 
The felspar is kaolinised. 
0 %), a few Radiolaria, 
ponge spicules, Lituolidfe, 
auconitic casts. Diatoms. 
(I'OO %), m. di. O'lO mm., 
angular ; quartz, glauconite, 
felspar, augite, magnetite. 
(47 74 %), amorphous matter 
and fine mineral particles. 
The pelagic Foraminifera are dwarfed in character. 
Glauconite is abundant ; glauconitic casts of the 
Foraminifera were observed. Note the appearance of 
glauconite on approaching a continental shore. 
3 %), Sponge spicules. 
(70'00%), m. di. 2'00 mm., 
rounded ; quartz, felspar, 
augite, glauconite, mica, mag- 
netite, hornblende. 
(6 '83 %), amorphous matter, 
flocculent organic matter, and 
minute fragments of minerals. 
Many of the organisms are macroscopic. Quartz is the 
principal mineral, many of the grains of which are milky 
and rounded, some of the largest having a diameter of 
1 cm. There is also present a quantity of amorphous 
flocculent clayey and organic matter, which gives a 
light green tinge to the deposit. 
) %), Sponge spicules, white 
d pale green casts of Fora- 
nifera and other organisms, 
tuolidie. Diatoms. 
(40'00%), m. di. 0'35 mm., 
rounded and angular ; quartz, 
glauconite, felspar, garnet, 
black mica, hornblende. 
(4 '54 %), greenish coloured mat- 
ter (possibly organic), frag- 
ments of minerals and Diatoms. 
The quartz grains in many cases are rounded and the 
felspar kaolinised ; all the minerals are more or less 
covered with a greenish substance. Small glauconitic 
concretions contained phosphate of lime. 
1 %), Sponge spicules, grey 
d green casts of Foramini- 
■a, Astrorhizidse, Lituolidae, 
atoms. 
(20'00 %), m. di. 0'20 mm., 
rounded ; quartz, glauconite, 
felspar, hornblende. 
(6 '25 %), amorphous matter, 
fragments of minerals and 
siliceous organisms, with 
some green particles. 
In the dredge there were a few glauconitic concretions 
measuring from 2 to 6 mm. in diameter. There was 
here, as at the last station, much green coloured 
amorphous matter in the mud. Some portions seemed 
like vegetable tissue ; when heated on platinum it 
gave off an organic smell. This green substance 
and the glauconite give the green colour to the 
residue. There were a good many phosphatic con- 
cretions, some of them over a centimetre in diameter. 
Tristan da Cunlia to Cape of Good Hope. Cape of Good JIopc to JIarioii Isluiid. 
