REPORT ON THE DEEP-SEA DEPOSITS. 
119 
T 

Residue. 
i 
Additional Obseevations. 
eri Siliceous Organisms. 
Minerals. 
Fine Washings. 
T 
No trace of any kind came up in the tube to indicate the 
nature of the bottom. In the trawl were a piece of 
black volcanic ash and a portion of branching coral 
(Gorgonia) ; on the iron of the beam was a trace of 
calcareous volcanic mud. 
56 (3'00%), Sponge spicules, Lituo- 
[ lid®, Diatoms. 
(2’00 %), m. di. OTO mm., 
rounded ; volcanic glass, 
felspar, magnetite, mica, 
hornblende, augite, pala- 
gonite, pumice. 
(6 ‘SO %), a small quantity of 
flocculent amorphous matter, 
mineral and siliceous remains. 
All the minerals are of volcanic origin. 
m' (I’OO %), one or two Diatoms. 
(58 '00 %), m. di. 0'40 mm., 
angular and rounded ; olivine, 
felspar, augite, hornblende, 
magnetite. 
(1‘24 %), amorphous flocculent 
matter and a few mineral 
remains, a few fragments of 
Diatoms. 
The white and red particles making up the sand are 
rounded, and measure about 1 mm. in diameter. The 
minerals consist almost exclusively of unaltered crystals 
of olivine, and some vitreous particles. 
0 1(1 ’00%), Sponge spicules, one 
' or two Diatoms. 
(5 '00 %), m. di. 0'08 mm., 
angular ; magnetite, plagio- 
clase, felspar, hornblende, 
augite, brown volcanic glass, 
pumice, palagonite. 
(84 ’00 %), a considerable 
quantity of blue coloured 
amorphous matter and minute 
mineral particles. 
The mud here described came up on the anchor. It is 
of a dark blue colour and contains several varieties of 
small Foraminifera and many small calcareous particles 
mixed up with debris of volcanic rocks and ashes, 
and coal from ships. The blue mud extends only as far 
as the reef, for just outside there is a pure Coral Sand. 
On treatment with acid a large quantity of sulphuretted 
hydrogen is liberated. 
The tube came up quite empty, but on the outside, one 
foot above the valves, there was a slight trace of a 
reddish mud, containing many black and white mineral 
particles and many remains of siliceous organisms, in- 
cluding Diatoms. One piece of Glohigerina was the 
only evidence of carbonate of lime. 
^0 (3’00 %), Sponge spicules and 
Diatoms. 
1 
1 
(20 '00 %), m. di. O'lO mm., 
angular ; magnetite, plagio- 
clase, augite, olivine, glassy 
volcanic particles, palagonite. 
(72'00 %), a considerable 
quantity of minute mineral 
fragments, some amorphous 
matter, and a few remains of 
siliceous organisms. 
The mud is chiefly composed of volcanic debris. 
O' \2'00 %), Radiolaria, Sponge 
( ^ spicules, Haplophragmium 
• 1 lalidorsatum, Diatoms. 
(70‘00 %), m. di. 0'12 mm., 
angular ; olivine, brown splin- 
ters of volcanic glass, plagio- 
clase, augite, magnetite. 
(28 "00 %), many fine mineral 
particles, a small quantity of 
amorphous matter. 
Only a small quantity of the deposit came up in the tube. 
This consisted chiefly of volcanic debris ; some green 
crystalline particles had a coating of dull black. 
0i|3'00%), Radiolaria, Sponge 
. 1 spicules, Haplophragmium 
( 1 lalidorsatum, Trochammina 
1 trullissata, Diatoms, 
i 
01 1 '00 %), Sponge spicules, Radio- 
j laria, Astrorhizidse, Lituolidse, 
I Diatoms. 
1 
1 
1 
1 
(50'00 %), m. di. 0'08 mm., 
angular ; brown volcanic 
glass, plagioclase, magnetite, 
augite, hornblende, olivine, 
phillipsite. 
(I'OO %), m. di. 0’06 mm., 
angular ; felspar, palagonite, 
magnetite, hornblende, 
augite, black mica, phillipsite. 
(47 '00 %), fine minerals, some 
amorphous matter, and some 
' siliceous remains. 
(98 '00 %), much fine amorphous 
matter, remains of minerals 
and siliceous organisms. 
The deposit consists mainly of volcanic debris, much finer 
than at the previous station. There is also less olivine 
here than in the previous deposit. 
The valves of the sounding tube had not opened, and con- 
sequently it contained no deposit. The tube was 
coated on the outside for about two feet with Red Clay ; 
this was scraped off and subjected to examination, but 
gave no indication of carbonate of lime. Palagonite 
was abundant. In the bag of the trawl were seven or 
eight small manganese nodules, and some small 
hardened pieces of the bottom, but no clay proper. 
Some pieces of the bottom had a slight coating of 
manganese, while others were perforated by worms, 
the tracks of which were, in some cases, coated with 
manganese. The manganese nodules were not of the 
usual rounded character but were very irregular. In 
addition to these there were small sharks’ teeth and 
Cephalopod beaks. 
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Yokohama to Sandwich Islands— coHimwcrf. Sandwich Islands to Tahiti. 
