REPORT ON THE DEEP-SEA DEPOSITS. 
93 
Residue. 
Additional Observations. 
Siliceous Organisms. 
Minerals. 
1 Fine Washings. 
1(2 '00 %), Sponge spicules, Am- 
modiscus iiicertus, a few 
1 brown casts. 
[ 
(2 ’00%), m. di. 0'06 mm., 
angular ; felspar, plagioclase, 
augite, mica, hornblende, 
magnetite, volcanic glass 
splinters, pumice, glauconite. 
(42 '25 %), a considerable 
quantity of fine clayey and 
other matter, coloured red by 
iron, minute mineral particles, 
and remains of siliceous organ- 
isms. 
There was a large quantity of this deposit, of a uniform ' 
character throughout, in the sounding tube. The Fora- 
minifera are large and very perfect and include a few 
Text'ularia and Rotalia, as well as Pulvinulina favus. 
All the pelagic forms are typical of a tropical Globi- 
gerina Ooze. The volcanic glass in some cases has been 
highly altered. 
(2 "00 %), Radiolaria, casts of 
Foraminifera in manganese 
and iron, Sponge spicules, 
Astrorbizidee, Lituolidee, a 
few Diatoms. 
! 
(2'00 %), m. di. 0‘06 mm., 
angular ; felspar, quartz, 
mica, hornblende, augite, 
magnetite, fragments of 
pumice. 
(43 '36 %), amorphous matter, 
with many small fragments 
of minerals and siliceous 
organisms. 
In the trawl there were many pumice stones, several 
cocoa-nuts, and other fruits. To these were attached 
Hydroids, Brachiopods, Annelids, and Cirripeds. Some 
of the largest pumice stones have a diameter of about 
5 cm., all more or less rounded, some porous, 
some homogeneous, some filamentous, some scoriaceous; ! 
others have a greenish tinge, with a thin coating of ! 
manganese, and are rather hard, but not so much J 
altered as those at Station 175. 
|0'OO%), many casts of Fora- 
minifera of a reddish colour, 
Astrorhizidje, Lituolidse. 
(4’00 %), m. di. 0’07 mm., 
angular and rounded ; quartz, 
felspar, mica, magnetite, 
augite, glauconite, olivine. 
(3 '03 %), flocculent amorphous 
matter, some fine mineral 
particles. 
This deposit contains very many casts of Foraminifera 
which are nearly all of a brick-red colour although a ! 
few have a greenish tinge ; there was, however, no 
typical glauconite observed. Many of the organisms 
are macroscopic. The numher of pelagic forms varies 
greatly in different samples. 
i 
;i'00 %), Sponge spicules, a few 
brown casts of calcareous 
organisms. 
1 
(6 '00 %), m. di. 0’30 mm., 
rounded, smallest particles 
angular ; quartz, plagioclase, 
augite, hornblende, felspar, 
mica, tourmaline, glauconite 
grains, magnetite. 
(3 '86%), a small quantity of floc- 
culent organic matter and fine 
mineral particles. 
1 
This deposit is made up for the most part of Corals, frag- 
ments of Lamellibranchs and Gasteropods, Orbitolites, 
Amphistegina, Heterostegina, and Rotalia. The grains 
making up the “sand” measure from 1 to 10 mm. 
in diameter. 
J 
(2‘00 %), Sponge spicules, 
LituolidiB, 
(30'00 %), m. di. 0'50 mm., 
rounded ; quartz, olivine, fel- 
spar, magnetite, glauconite. 
(5 '85 %), flocculent amorphous 
matter, and fine mineral par- 
ticles. 
A large percentage of the carbonate of lime comes from | 
fragments of calcareous rocks and concretions. These j 
fragments average in diameter about 1 cm. In addition I 
there are a few conglomerated masses about 1 cm. in ^ 
diameter, and quartz and other mineral particles 
cemented together by a reddish material. Worm tubes j 
composed of grain® of quartz are also present, and shell 
fragments cemented together. ^ 
(5 "00 %), Lituolidse, Textula- 
rida;, Sponge spicules, casts 
of calcareous organisms. Dia- 
toms. 
(25'00 %), m. di. I'OO mm., 
rounded, liner grains angular 
and often coated with limo- 
nite ; chiefly quartz, some 
grains of milky quartz. 
(10'34 %), amorphous ferrugin- 
ous matter, fine minerals, and 
siliceous remains. 
The sandy and calcareous concretions of the bottom 
measure from one to many centimeti'es in diameter, 
and on treatment with acid leave a considerable quan- 
tity of yellow-red residue, chiefly made up of casts of 
organisms. A second dredging, obtained near the first, i 
was found to be finer but otherwise similar. Nearly all 
the organisms arg impregnated with red oxide of iron, 
giving a decided colour to the deposit. j 
New Hebrides to Raiiie Island— mobbn/erf. Oil’ Raiiie Island. Capo York to .\rrou bsliuids. 
