i 
REPOET ON THE DEEP-SEA DEPOSITS. 103 
j Residue. 
Additional Observations. 
j Siliceous Organisms. 
Minerals. 
line Washings. 
.lO'OO %), Sponge spicules, 
1 arenaceous Textularidse, 
Astrorbizidae, Haplophragm- 
1 ium, casts of calcareous or- 
ganisms, Diatoms. 
(20 '00 %), m. di. 0’20 mm., 
angular and rounded ; quartz, 
glauconite, plagioclase, fel- 
spar, augite, hornblende, mag- 
netic particles. 
(34 T8 %), amorphous matter, 
fine mineral particles, and 
remains of siliceous organ- 
isms. 
This seems to be a Green Mud in process of formation and 
resembles that obtained off the coast of Australia, 
Station 164. Abundant casts of the organisms remain 
after treatment with acid. 
3 '00 %), Sponge spicules, 
Eadiolaria, arenaceous Textu- 
laridse, casts of calcareous or- 
ganisms, Diatom.s. 
(1'00%), m. di. 0'08 mm., 
angular ; glauconite, felspar, 
plagioclase, augite, magnetite, 
hornblende, olivine {?), altered 
volcanic rocks, a great many 
small yellow pellets, round 
and opaque in centre, probably 
altered glauconite or imperfect 
casts. 
(59 ‘94 %), much amorphous 
matter, fine mineral particles, 
and fine siKceous remains. 
This is in the same position as the previous station, and 
is known as the Euplectella gi’ound. 
There were a great many oval arenaceous bodies, of dif- 
ferent sizes, believed to be the excreta of Echinoderms. 
3'00 %), Sponge spicules 
(Euplectella and Geodia), 
Eadiolaria, Reophax spicv.li- 
1 fera, arenaceous Textularidse, 
Diatoms. 
(5’00 %), m. di. 0'08 mm., 
angular ; plagioclase, volcanic 
glass, quartz, magnetite, horn- 
blende, hypersthene, augite, 
sanidine. 
(75 '00 %), amorphous matter, 
fine minerals, and siliceous 
remains. 
The sounding was taken close to the Island of Camiguin 
in 185 fathoms. The bottom is a Blue Mud contain- 
ing Olohigerina, Pteropods, &c., and many small red 
and white mineral particles of volcanic origin. A 
piece of tufa about 0'5 cm. in diameter was observed 
in the washings. Hornblende and augite are here 
more abundant than in other deposits of a similar 
kind. 
2‘00 %), Eadiolaria, Sponge 
spicules, Astrorhizidse, Lituo- 
' lidse. Diatoms. 
(2 "00 %), m. di. OTO mm., 
angular ; plagioclase, felspar, 
quartz, augite, hornblende, 
black mica, magnetite, vol- 
canic glass, pumice, lapilli. 
(81 ‘37 %), light coloured clayey 
and amorphous matter, fine 
mineral particles, and siliceous 
remains. 
The sounding was taken in the Sulu Sea in 2225 fathoms. 
The tube was nearly full of mud, all above the valve 
being of a red colour, that below slate blue ; no difference 
but that of colour can be detected in the two samples ; 
the blue, however, appears to have more clayey and 
earthy matter than the much more diffuse upper layer. 
i 
On February 2, 1875, in the same locality, large frag- 
ments of plagioclase, often zonary, embedded in a 
vitreous coating, crystals of augite, magnetite, and 
hornblende, were observed in the mud. 
|5'00 %), Eadiolaria, Astror- 
bizidae, Lituolidse, Diatoms. 
( 
(60'00 %), m. di. 0'20 mm., 
angular ; quartz, sanidine, 
plagioclase, magnetite, horn- 
blende, mica, pumice. 
(33 '25 %), amorphous matter, 
many minute fragments of 
minerals, and a few fragments 
of siliceous organisms. 
In the reddish surface layer one or two fragments of 
Foraminifera and a fragment of Pteropod were noticed, 
but the deeper blue coloured portions contain no car- 
bonate of lime organisms, and do not show the least 
effervescence with acids. The Eadiolaria appear also 
to be much more numerous in the reddish surface 
layer. There were many large hardened lumps of the 
deposit in the trawl, which contained many fragments 
of wood, leaves, and branches. The hornblende and 
felspar, often filled with vitreous inclusions, are, like i 
many of the minerals, enveloped in a vitreous volcanic ■ 
coating. Some fragments of rocks have a diameter of 
0’5 mm. 
Manila to Sainboaiigan— Sainboaiigan to Now OniTica. 
