REPORT ON THE DEEP-SEA DEPOSITS. 
107 
Residue. 
Additional Observations. 
Siliceous Organisms. 
Minerals. 
Fine Washings. 
■00 %), Sponge spicules (in- 
cluding Geodia), Astrorhizidae, 
LituoUdae, Kadiolaria, Dia- 
toms. 
(lO^OO %), m. di. O^IO mm., an- 
gular ; pumice, brown glassy 
volcanic particles, felspar, 
plagioclase, ■ augite, quartz, 
magnetite, altered olivine, 
lapilli. 
(68 '83 %), much fine amorphous 
matter, minute mineral and 
siliceous remains. 
This deposit was red on the top, grey at the bottom, 
and contained some pumice fragments. There is no 
difference save that of colour between the upper and 
lower layers. In the bag of the trawl were much mud 
and large pieces of pumice and other stones, varying 
in size from that of a pea to that of a hen’s egg. These 
are slightly impregnated in some cases with manganese 
and overgrown with Serpula and Eyperammina vagans. 
Pieces of wood, fruits. Annelid tubes, Pteropod and 
lanthina shells were also in the trawl. Ehizammina 
algaeformis is common. Many excreta of Echinoderms. 
•00 %), Sponge spicules, As- 
trorhizidae, arenaceous Textu- 
laridae, a few imperfect casts, 
Diatoms. 
(I'OO %), m. di. 0^06 mm., an- 
gular ; fragments of pumice, 
black or brown altered vol- 
canic glass, felspar, augite, 
magnetite, quartz, manganese 
grains. 
(10^13 %), amorphous matter, 
fine mineral particles, and re- 
mains of siliceous organisms. 
Several dredgings were taken ; the bottom was always 
found to bo a Coral Sand or Coral Mud. The pelagic 
Foraminifera are rare. The sands are coarse and made 
up of fragments of Coral, calcareous Algae, Lamelli- 
branchs, and Gasteropods. Many of the fragments 
are overgrown with Foraminifera, andPolyzoa. 
A few imperfect casts remain after treatment with acid. 
•70 %), Sponge spicules. 
(70 •OO %), m. di. 0^25 mm., an- 
gular and rounded ; plagio- 
clase, sanidine, pyroxene, 
hornblende, olivine more or 
less altered, magnetite, splin- 
ters of volcanic glass, pala- 
gonite, small rounded lapilli, 
quartz. 
The sand is composed of fine particles of volcanic minerals, 
averaging in size 0^25 mm., mixed with calcareous 
organisms. 
A sounding and dredging were taken about a mile from 
the reef in 152 fathoms. Only traces of a greenish 
coloured sand were in the sounding cup. 
■00 %), Kadiolaria, Sponge 
spicules, Astrorhizidse, Lituo- 
lid*, Diatoms. 
(2^00 %), m. di. O'lO mm., an- 
gular ; pumice, plagioclase, 
magnetite, brown glassy vol- 
canic particles, hornblende, 
very small lapilli of andesitic 
rocks. 
(32 •25 %), fine amorphous mat- 
ter, minute mineral fragments, 
and fine remains of siliceous 
organisms. 
In the trawl were several rounded pieces of pumice, about 
i to 1 inch (12 to 25 mm.) in diameter, -u'hich were 
slightly impregnated with manganese in some cases and 
also overgrown with a Rhizopod (probably Hyper- 
ammina). 
•00 %), Eadiolaria, Sponge 
spicules, Reophax, Lituolidse, 
Diatoms. 
(l^OO %), m. di. O^IO mm., 
angular ; pumice, felspar, 
augite, palagonite, magnetite. 
(97 ■00 %), much fine chocolate 
coloured amorphous matter, 
minute mineral particles, and 
siliceous remains. 
On examination of the washings of a large quantity, a 
piece of pumice about the size of a pea was found, and 
one or two arenaceous Foraminifera ; also a good 
many manganese grains. 
•00 %), Radiolaria, Astrorhi- 
zidse, Diatoms. 
(2^00 %), m. di. O'lO mm., 
angular ; magnetite, glassy 
volcanic fragments, man- 
ganese grains. 
(89 ‘14 %), much amorphous 
matter, fine mineral ahd 
siliceous remains. 
The Globigerinidae are chiefly fragmentary. In the 
washings was a piece of jmmice, about the size of a 
pea, overgrown with Hypcrammina vagans. 
New Guinea to Ailmiralty Islands. Admiralty Islands to Yokoliaina. 
