REPORT ON THE DEEP-SEA DEPOSITS. 
97 
Residue. 
Siliceous Organisms. 
Minerals. 
Fine Washings. 
(5'00 %), Sponge spicules, Textu- 
laridae, casts of calcareous or- 
ganisms. 
(I'OO %), m. di. OTO mm., 
rounded ; glauconite, quartz, 
felspar, zircon, olivine, horn- 
blende. 
(14‘44 %), amorphous matter, 
fine mineral particles, and 
siliceous remains. 
5-00 %), Sponge spicules, 
Radiolaria, Diatoms. 
(60'00 %), m. di. 0‘20 mm., 
angular ; felspar, plagioclase, 
volcanic glass, augite, magne- 
tite, andesitic lapilli. 
(35 '00 %), fine amorphous 
matter, fine mineral particles, 
and siliceous remains. 
(47'91 %), angular; lapilli of 
volcanic rocks, plagioclase, 
augite, hornblende, magne- 
tite, black glassy volcanic 
particles, olivine. 
A small quantity of fine amor- 
phous matter. 
'3 '00 %), Sponge spicules, a 
few Radiolaria, Astrorhizidae, 
Lituolidae, Diatoms. 
(lO'OO %), m. di. OTO mm., 
angular; magnetite, brownish 
vesicular volcanic glass, 
pumice, plagioclase, horn- 
blende, augite. 
(55 ’64 %), fine amorphous 
matter, with minute mineral 
particles and remains of sili- 
ceous organisms. 
2 '00 %), Sponge spicules, Lituo- 
' lidae, Diatoms. 
1 
1 
! 
(15 '00 %), m. di. 0’20 mm., 
angular and rounded ; plagio- 
clase, sanidine, pyroxene, 
magnetite, quartz, altered 
olivine, pumice, particles of 
volcanic rocks (some altered). 
(23 '74 %), flocculent amorphous 
matter, minute mineral parti- 
cles, and fine siliceous re- 
mains. 
Additional Obseuvations. 
In the trawl were several large pieces of honeycombed 
rock, and many rounded more or less hardened nodules. 
These nodules, when examined, were found to be com- 
posed entirely of the shells of Olobic/erina, Pulvinu- 
lina, and Orhulina, — in short, a Globigerina Ooze 
more or less hardened. The large pieces of rock are 
very hard, requiring heavy strokes of a hammer to 
break them, and are overgrown with Serpula, Car- 
penteria, Polytrema, Sponges, Corals, Polyzoa, &c. 
Only traces of the deposit came up in the sounding tube ; 
it had evidently been washed out. In the water-bottle, 
however, there was a small quantity of a red-green 
colour. No Foraminifera were observed in this latter, 
but in that obtained in the sounding tube three Pid- 
mnulinoi shells were observed. 
Some pebbles and mineral particles came up in the tube. 
Mixed with these were some pelagic Foraminifera. 
The minerals were generally volcanic, and attached 
to one was a piece of coral. In the dredge were several 
fragments of volcanic rocks and pumice, measuring 
from 1 to 4 inches (25 mm. to 10 cm.) in diameter. 
Corals, siliceous Sponges {Aphrocallistes, &c.), and 
calcareous Algae. 
A large proportion of the deposit is made up of calcareous 
Algae encrusting nuclei of various materials, such as 
rock fragments,. Corals, &c., and forming nodules from 
I to 4 inches (6 mm. to 10 cm.) in diameter. The 
rock fragments are from 1 to 5 cm. in diameter, with 
a few smaller mineral particles. The volcanic minerals 
are very often surrounded with black volcanic glass ; 
they may be considered as splinters or products of 
disintegration of a basaltic rock or as a volcanic ash. J 
A large quantity of the mud came up in the sounding 
tube. There was a watery brown layer on the top, 
whereas the remainder was a compact Blue Mud ; both, 
however, were of the same composition. In the dredge 
there were a number of pumice nodules, varying from 
^ to 4 inches (12 mm. to 10 cm.) in diameter, slightly 
impregnated with manganese. To several of the smaller 
ones there were attached specimens of A'ntipathes. One 
or two twigs and seeds were also found in the dredge. 
Pieces of twigs and leaves were present. A piece of vol- 
canic tufa about an inch (25 mm.) in diameter was also 
obtained. Small fragments of rocks 3 or 4 mm. in 
diameter were found among the minerals. Hctcrostcgina ‘ 
complanata, var. granulosa, is largelj' represented. ' 
(deep-sea deposits chall. exp. — 1890.) 
13 
Arrou Islands to Banda — continued. Banda to Amboina. 
