REPORT ON THE DEEP-SEA DEPOSITS. 
67 
RESIDUE. 
Additional Observations. 
Siliceous Organisms. 
Minerals. 
Fine Washings. 
(I'OO %), a few Radiolaria and 
Diatoms. 
(I'OO %), one or two Radiolaria, 
Sponge spicules, Lituolidee. 
(30-00 %), m. di. 0'17 mm., 
rounded ; olivine, enstatite, 
serpentine, magnetite, actino- 
lite. 
(15'00 %) m. di. 0'18 mm., 
rounded ; olivine, enstatite, 
serpentine, actinolite, felspar, 
augite. 
(11 '66 %), amorphous matter, 
with minute mineral particles. 
(11 '23 %), amorphous matter 
and minute mineral particles. 
V 
The mineral particles are chiefly from St. Paul’s Rocks 
and consist of grains of olivine, numerous fragments of 
micaceous scales, finely lamellar, yellowish with bronze 
or silver lustre, — of which the microscopic characters 
1 are those of enstatite or bronzite, — sometimes having 
' brown linear inclusions following the prismatic 
cleavage. There are also present fragments of 
serpentine almost colourless or slightly gi-een. A few 
of the organisms are macroscopic. Might be called 
Pteropod Oozes. ^ 
(2 '00 %), Radiolaria, Lituolidse, 
Diatoms. 
(I'OO %), m. di. 0'06 mm., 
angular ; felspar, hornblende, 
augite, magnetite, pumice, 
glassy volcanic particles, 
grains of manganese. 
(24'07 %), amorphous matter, 
with minute mineral particles. 
Note the absence of shells of Pteropods at this depth, ■■ 
and the less amount of carbonate of lime in the next 
with reference to the depth. 
d'OO %), Radiolaria and Dia- 
toms. 
(1'00%), m. di. 0'06 mm., 
angular ; felspar, magnetite, 
hornblende, augite, glassy 
volcanic particles. 
(61 '94%), amorphous matter, 
minute mineral particles, 
fragments of siliceous organ- 
isms. 
This deposit contains much amorphous clayey matter 
compared with those at Stations 110 and 112 in lesser 
depths. The majority of the organisms which make up 
the carbonate of calcium are in a fragmentary con- 
dition. Might be called a Red Clay. 
1 '00 %), Radiolaria, Sponge 
spicules, Astrorhizidie, Lituo- 
i lidse. 
(1'00%), m. di. O'lO mm., 
angular ; plagioclase, felspar, 
pyroxene, black mica, zircon, 
magnetite, glassy volcanic par- 
ticles. 
(16 '73 %), amorphous matter, 
with minute mineral particles. 
Many of the Poraminifera, especially Pulvinulina men- 
ardii, are macroscopic. 
i few Sponge spicules. 
(I'OO %), m. di. 0'60 mm., 
rounded ; fragments of vol- 
canic rocks, quartz, felspar, 
glauconite, magnetite, augite, 
hornblende, glassy volcanic 
fragments. 
(6'72%), a small quantity of 
flocculent organic matter and 
fine mineral particles. 
The individual particles which make up this deposit vai-y 
from 2 to 3 cm. in diameter, and are chiefly composed 
of calcareous Algae of various species, some of these 
being bright red in colour. Volcanic pebbles were 
numerous in the dredgings. J 
1 '00 %), Radiolaria, Sponge 
spicules, Lituolidae. 
(I'OO %), m. di. O'lO mm., 
rounded and angular ; quartz, 
felspar, augite, hornblende, 
black mica, magnetite, glassy 
volcanic fragments. 
(18'70%), amorphous matter and 
small mineral particles. 
Some of the Poraminifera are macroscopic. Black mica 
is rare, but magnetite in isolated crystals and as in- 
clusions in other minerals is abundant; some of the 
glassy fragments are reddish, and transformed into 
palagonite. 
1 '00 %), a few Radiolaria and 
Sponge spicules, Lituolidae. 
(I'OO %), m. di. 0'06 mm., 
angular ; quartz, felspar, 
augite, hornblende, mica, 
magnetite, glassy volcanic 
particles. 
(32'96%), amorphous matter and 
fine mineral particles. 
Many of the shells of Poraminifera — Pulvinulina men- 
ardii, &c.,— are macroscopic; some of the quartz par- i 
tides are rounded. j 
1 
1 
j. '00 %), one or two fragments 
1 of Radiolaria, Sponge spicules, 
1 Lituolidae, imperfect brown 
1 casts. 
(5'00 %), m. di. O'lO mm., 
angular and rounded ; quartz, 
felspar, augite, magnetite, 
mica. 
(37 '41 %), amorphous and floc- 
culent matter, many fine 
mineral particles, and minute 
fragments of siliceous spi- 
cules. 
The pelagic Molluscs do not seem to be so abundant as 
in the sounding at 500 fathoms, nor are the mineral 
particles so large. Some of the shells are macroscopic. 
■00 %), one or two Sponge 
spicules, Astrorhizidae, Litu- 
olidie. 
(lO'OO %), m. di. 0'15 mm., 
rounded and angular ; quartz, 
mica, felspar, hornblende, 
olivine, epidote. 
(28 '21 %), amorphous matter, 
with many small mineral 
particles. 
The majority of the organisms found in this deposit are | 
in a fragmentary condition ; some of them are macro- 
scopic. The felspar is kaolinised. 
J 
oil St. Paul’s Rocks. St. Paul’s Rocks to Feriiautlo Noronha. Fernando Noronha to Pernambuco. 
