E.EPOKT ON THE DEEP-SEA DEPOSITS. 
41 
Residue. 
Additional Observations. 
Siliceous Organisms. 
Jlinerals. 
Fine Washings. 
I'OO %), a few Sponge spicules, 
Haplophragmium. 
(25^00 7o)j 111- di. 0^06 mm., 
angular ; lapilli of basaltic 
rocks, plagioclase, sanidine, 
augite, olivine, magnetite. 
(37 •SO 7o)j many fine mineral 
particles, amorphous matter, 
a few remains of siliceous 
spicules. 
J 
Except for the large number of mineral particles of vol- 
canic origin,, these deposits might equally well be 
called Globigerina Oozes. 
2 '00 7o)j Sponge spicules, frag- 
ments of Eadiolaria, Astror- 
hizidse, Cydanimina, Textu- 
laridse. 
(40 •OO 7o)j HI- di. 0^08 mm., 
angular ; lapilli of basaltic 
rocks, scoriaceous fragments, 
felspar, augite, olivine, horn- 
blende, magnetite, glassy vol- 
canic particles. 
(28 •OS 7o)) minute fragments of 
minerals, amorphous matter, 
many minute fragments of 
siliceous organisms. 
This deposit contains very many particles of volcanic 
sand and a considerable quantity of amorphous matter. 
There are also many coloured particles, some altered 
to palagonite. Some of the Foraminifera are macro- 
scopic. Dredge brought up a large- quantity of the 
mud. 
2 '00 7o)> Eadiolaria, Sponge 
spicules. Diatoms. 
(15^00 7o)i HI- di- mm., 
angular ; quartz, sanidine, 
olivine, augite, lapilli, mag- 
netite, fragments of pumice. 
(33^00 7o)) amorphous matter, 
many minute fragments of 
minerals, remains of siliceous 
organisms. 
The carbonate of calcium is made up almost entirely of 
pelagic Foraminifera. Among the minerals are some 
rounded grains of quartz covered with limonite. 
Dredge came up empty. 
1 '00 7o)i Sponge spicules, 
Eadiolaria, Astrorbizidse, 
Trochammina, a few imperfect 
casts. 
(2^00 7o)j ID- di. 0^07 mm., 
angular ; quartz, monoclinic 
and triclinic felspars, magne- 
tite, olivine, augite, glassy 
volcanic particles. 
(32 ^45 7o)i amorphous matter, 
many fine mineral particles, 
a few fragments of siliceous 
organisms. 
Some of the quartz grains are covered with limonite, and 
measure about 1 mm. in diameter. Some of the 
organisms are macroscopic. Dredge half full of mud ; 
nothing found on sifting except otoliths of fish and 
Pteropod shells. ^ 
iO'OO 7o)> Sponge spicules, 
Eadiolaria, thin imperfect 
casts of Foraminifera and 
other organisms, Hyperam- 
mina. 
(lO^OO 7o)> di. O'lO mm., 
angular ; felspar, black mica, 
augite, manganese grains, 
glassy volcanic particles, red- 
coloured altered fragments. 
Amorphous matter. 
Two soundings were taken, and on each occasion no 
deposit came up in the tube. The dredge brought up a 
large Sponge, Poliopogon amadou, and a small quantity 
of the ooze was obtained attached to the basal portion. 
In the dredge there were manganese nodules and 
many fragments of a dead Coral covered with a thin 
coating of black shining manganese. Many of the 
organisms are macroscopic. 
... 
No deposit obtained ; sounding line broke in hauling in. 
•00 %), Eadiolaria, Sponge 
spicules, Aschemonella, Lituo- 
lidse. 
(l^OO %), m. di. 0'06 mm., 
angular and rounded ; quartz 
covered with limonite, magne- 
tite, felspar, augite, pumice, 
black mica. 
(86 •OO %), a great many fine 
mineral particles, amorphous 
matter, fragments of siliceous 
organisms. 
Dredge full of clay, on sifting which a few shells of Mol- 
luscs were found in addition to the Foraminifera. 
A few mineral particles. 
Much amorphous matter. 
A small quantity of the deposit came up in the tube. 
•00 %), Siliceous spicules, 
Haplophragmium . 
(l^OO %), m. di. 0^06 mm., 
angular; felspar, black mica, 
fragments of pumice, a few 
small rounded grains of quartz 
covered with limonite, zircon, 
manganese grains. 
(93 ^89 %), amorphous matter, 
many minute fragments of 
minerals, and a few remains 
of siliceous organisms. 
This deposit was of a brown-yellow colour when taken 
from the tube, smooth and homogeneous. 
(DEEP-SEA DEPOSITS CHALL. EXP. 1890 .) 
Between the Canary Islands — contimicd. Tenerife to Sombrero Island. 
