REPORT ON THE DEEP-SEA DEPOSITS. 
127 
Residue. 
intl 
Siliceous Organisms. 
Minerals. 
Fine Washings. 
Additional Observations. 
9 ; (I'OO %), Sponge spicules, Radi- 
olaria, Lituolidae, Diatoms. 
(10 ’00 %), Eadiolaria, Sponge 
spicules, AstrorMzidae, Litu- 
olidie, arenaceous Textu- 
laridse. Diatoms. 
5 '1'00%), a few Eadiolaria, 
I one or two Sponge spicules, 
Bhizammina algmformis (frag- 
; ments), Lituolidse. 
7 'I'OO %), a few Eadiolaria, 
i Sponge spicules, Astrorhizidae, 
LituoUdie, arenaceous Textu- 
laridse. 
(10 '00 %), m. di. O'lO mm., 
angular ; plagioclase, augite, 
phlllipsite, magnetite, manga- 
nese grains, glassy volcanic 
particles. 
(I'OO %), m. di. 0'08 mm., 
angular ; volcanic glass, fel- 
spar, palagonite, hornblende, 
phillipsite, black mica, mag- 
netite. 
(I'OO %), m. di. 0'06 mm., 
angular ; glassy volcanic par- 
ticles, felspar, olivine, augite, 
palagonite, pbiUipsite, horn- 
blende, magnetite, cosmic 
spherules. 
(I'OO %),m.di.0'06mm., angular; 
manganese grains, magnetite, 
palagonite, felspar, olivine, 
augite, a few glassy volcanic 
particles, magnetic spherules. 
(2'00 %), m. di. O'lO mm., 
angular ; fibro-radiating glob- 
ules and loose crystals of 
phillipsite, sanidine, plagio- 
clase, augite, magnetite, mag- 
netic spherules, small con- 
cretions of manganese, and 
fragments of volcanic glass 
and rocks. 
(42 '39 %), much amorphous 
matter, fine mineral frag- 
ments, and remains of siliceous 
organisms. 
(23 '19 %), fine amorphous 
matter, minute mineral and 
siliceous remains. 
(71 '75 %), much fine amorphous 
matter, a few minute frag- 
ments of minerals and sili- 
ceous remains. 
(72 '87 %), much fine amorphous 
matter, minute mineral and 
siliceous remains. 
(97 '00 %), a large quantity of 
clayey matter, coloured by 
manganese, very small crystals 
of phillipsite, and minute 
mineral particles. 
Nearly a foot (30 cm.) of the deposit came up in the tube; 
the upper surface was a light yellow Globigerina 
Ooze. In addition to the observed organisms, there 
were a good many manganese grains, and yellow and 
red crystals. Passing down the tube the ooze became 
gradually darker, till at the bottom there was a dark 
chocolate coloured clay, containing manganese in 
rounded pellets, and many yellow crystals (phillipsite); 
some of these are in the form of balls. Twinned 
crystals of phUlipsite were observed. 
Many of the Foraminifera are coated on the outside with 
a deposit of a crystalline nature ; all stages of this 
deposition can be seen in the deposit. Pulvinulina 
menardii is absent. Coccoliths and Rhabdoliths are 
very abundant. 
Only a small quantity came up in the sounding tube. 
Crystals of phillipsite are present, as on the 9 th. Man- 
ganese grains are abundant. The trawl brought up 
some clay and a barrelful of manganese nodules. 
Among these were numerous sharks’ teeth, and eight 
or nine earbones of Cetaceans. The bony material of 
the teeth has been completely removed. Some of the 
nuclei of the nodules are altered basaltic fragments, 
others volcanic glass, others augite-audesite or horn- 
blende-andesite. All the glassy fragments are cemented 
to the manganese coating by zeolites crystallised in 
situ. There are some angular pebbles, generally basalt 
or augite-andesite, and rounded ones of granite or frag- 
ments of clastic rocks composed of quartz, decomposed 
felspar, and mica (arkose). 
Two layers were to be observed in the contents of 
the sounding tube. The upper two inches were very 
dark red, the lower four or five inches light yellow, 
smooth, and firm. In the top layer only a few 
Foraminifera and Eadiolaria were present, a sample 
scarcely efl'ervescing with acid. The lower layer, how- 
ever, effervesced considerably, and the microscope 
revealed a few Foraminifera and immense numbers of 
very fine Coccoliths. There is much less manganese 
in the lower than in the upper layers. The trawl 
brought up large numbers of manganese nodules, 
sharks’ teeth, earbones of Cetaceans, one or two 
pieces of pumice, and a granite nodule 3 x 2 x J inches 
(7 '5 X 5 X 1 '2 cm.). There were also some clayey con- 
cretions of the bottom, perforated by worm -tubes, lined 
with manganese. 
About a quart of this deposit came up, containing an 
immense quantity of manganese, several of the nodules 
measuring from 0'5 to 1 cm. in diameter. In one or 
two instances these nodules are joined together. The 
Foraminifera are fragmentary except Uvigerina 
asperula^ which is the most commonly occurring. The 
crystals of phillipsite are very abundant in this deposit. 
Among the mineral particles are a number of small 
volcanic fragments, which appear opaque under the 
microscope. Associated with these there are small 
volcanic particles altered to brownish palagonite. 
I" 
|f 
Tahiti to Valparaiso — continued. 
