REPORT ON THE DEEP-SEA DEPOSITS. 
91 
Residue. 
Additional Observations. 
Siliceous Organisms. 
Minerals. 
Fine Washings. 
(10 '00 %), a few Radiolaria, 
principally red coloured casts 
1 of pelagic Foratninifera, Litu- 
oUdse, a few Diatoms. 
(lO'OO %), m. di. O'lO mm., 
angular ; felspar, augite, 
olivine, many fragments of 
pumice, lapilli, volcanic glass 
transformed into palagonite, 
manganese grains. 
(17'59 %), minute pumice and 
other mineral fragments, 
amorphous matter, and re- 
mains of siliceous organisms. 
The Foraminifera of this sounding are worthy of notice, 
as while some of them are quite white and rose 
coloured, others are deep brown or black and have in 
some cases a depo.sit of manganese on their surfaces. 
Very many of them are filled and covered with a red 
siliceous matter, which remains as external and in- 
ternal casts on removal of the carbonate of lime. On 
breaking one of these shells three distinct zones are 
observed : internal cast, shell, and external cast. 
i(3'00 %), Sponge spicules, a few 
' glauconitic-like easts of calca- 
1 reous organisms. 
(65 '00%), m. di. 0'30 mm., an- 
gular ; black vesicular glassy 
fragments, pumice, plagio- 
clase, augite, magnetite, more 
or less altered lapilli. 
(18 '86%), amorphous ferrugin- 
ous matter, very many mineral 
particles, and a few fragments 
of siliceous spicules. 
Amongst the mineral particles are fragments of rocks 
and pumice from 0'5 to 1 cm. in diameter. Of the 
mineral particles many are often surrounded with 
volcanic glass. Casts of some of the organisms in a 
green matter remain after treatment with acid. The 
concretions are overgrown with Corals, Serpula, 
Polyzoa, and Garpenteria. 
5 00 %), Radiolaria, Sponge 
spicules, a few Ammodiscv^ 
incertus, Diatoms. 
1 
(20 ‘00 %), m. di. 0'06 mm., an- 
gular ; felspar, plagioclase, 
augite, hornblende, pumice, 
small particles of manganese. 
(75 '00 %), amorphous matter, 
with many minute particles 
of pumice and other minerals, 
fragments of Diatoms and 
Sponge spicules. 
This deposit does not show any sensible effervescence with 
acids and no carbonate of lime organisms have been 
observed. There are many fragments of pumice, some 
of which are dark coloured. It would appear that this 
deposit has its origin chiefly from volcanic debris. 
' 2’00 %), Radiolaria and Sponge 
1 spicules. 
(5'00 %), m. di. 0'06 mm., 
angular ; plagioclase, augite, 
magnetite, pumice, brown 
glassy vesicular lapilli. 
(60 '71 %), much amorphous 
matter, many minute mineral 
particles, pumice debris, and 
fragments of siliceous organ- 
isms. 
The larger Foraminifera are much broken and decom- 
posed. Many small fragments of pumice, much de- 
composed, were observed among the minerals. 
i l'OO %), Sponge .spicules, frag- 
ments of Radiolaria, Haplo- 
phragmium, a few Diatoms. 
(2-00 %), m. di. 0‘06 mm., 
angular ; felspar, plagioclase, 
augite, hornblende, pumice, 
volcanic glass, magnetite. 
(96 '00 %), amorphous matter, 
minute mineral particles, and 
fine fragments of siliceous 
spicules. 
Truncatulina pygmma is the only perfect representative 
of the bottom-living calcareous Foraminifera observed; 
the pelagic Foraminifera are nearly all fragmentary. 
At the bottom part of the sounding tube there appeared 
to be a stratification, evidenced by very thin dark and 
light coloured layers. 
! 
1 '00 %), a few fragments of 
Sponge spicules, Lituolidae, 
casts of Foraminifera. 
i 
(I'OO %), m. di. 0'07 mm., 
angular ; felspar, volcanic 
glass, manganese grains. 
(91 '58 %), much amorphous 
matter, mineral and siliceous 
remains. 
The sounding tube was full of mud in two layers, the 
upper layer, about three inches deep, being a Red Clay 
very like that obtained at the last station. Very little 
effervescence was noticed on treating a portion with 
acid. 
Separated from the upper layer by a distinct line was 
a lighter coloured deposit which effervesced readily ; 
with acids, leaving a residue similar to the upper - 
layer. The minerals are the same in each layer. 
Coccoliths and Rhabdoliths are present, but only a few 
are perfect. The Globigerinidas are chiefly frag- 
mentary. A piece of pumice about 3 mm. in diameter 
was observed. In the trawl were many pieces of 
pumice from the size of a pea to that of a hen’s egg. 
1 
;1'00 %), fragments of Sponge 
spicules, a few casts. 
(I’OO %), m. di. 0'06 mm., 
angular ; felspar, plagioclase, 
augite, magnetite, palagonite, 
glassy volcanic particles, man- 
ganese grains. 
(65 '72 %), much brown amor- 
phous matter and fine mineral 
particles. 
2'00 %), Sponge spicules, a few 
Radiolaria, Rhahdammina, 
Haplophragmium. 
(2 '00 %), m. di. 0'07 mm., 
angular ; felspar, plagioclase, 
quartz, augite, magnetite. 
(46’10 %), amorphous matter, 
fine mineral particles, and 
minute siliceous remains. 
1 
Very little of the deposit was obtained, and considerable ; 
washing may have taken place in the sounding tube. ; 
A relatively large number of calcareous spicules of 
Alcyonaria are present. The pelagic Foraminifera are . 
nearly all fragmentary. j 
Fiji Islaiuls to 
Jvew Hebrides — contimicd. New Hebrides to Eaine Island. 
