EEPOET ON THE DEEP-SEA DEPOSITS. 43 
Ebsidue. 
Additional Obseevations. 
Siliceous Organisms. 
Minerals. 
Mne Washings. 
, 
•00 %), Sponge spicules, Haplo- 
phragmium. 
(1 •OO %), m. di. 0 •OS mm. , 
angular ; fragments of mono- 
clinic and triclinic -felspars, 
augite, hornblende, magnetite, 
black mica, rounded grains of 
quartz covered with limonite, 
(81 •SS %), amorphous matter, 
minute mineral particles, and 
a few fragments of siliceous 
organisms. 
The Globigerinidse are very much broken, and have a cor- *) 
roded appearance. The rounded quartz grains are 
almost certainly wind-borne. Dredge was empty, 
probably never reached the bottom. 
manganese grains. 
•00 %), Sponge spicules,. Soro- 
sphaira, lieophax. 
(l^OO %), m. di. 0'Q6 mm., 
angular and rounded; felspar, 
magnetite, black mica, augite, 
pumice, rounded grains of 
quartz covered with limonite, 
manganese grains. 
(94'89 %), amorphous matter, 
minute fragments of minerals 
and siliceous organisms. 
Only a few points of effervescence were noticed on treat- 
ing a portion of the deposit with dilute acid. The 
deposits have been gradually altering in character, 
becoming less rich in Foraminifera. This deposit con- 
sists almost entirely of Ked Clay in a state of fine divi- 
sion. Dredge one-fourth full of the clay ; sounding 
tube penetrated over a foot (30 ^48 cm.) into the deposit. 
■00 %), Sponge spicules, Kadio- 
laria, Raplophragmium. 
. 
(1-00 %), m. di. 0^06 mm., 
angular ; felspar, hornblende, 
magnetite, black mica, glassy 
volcanic particles. 
(84*70 %), amorphous matter, 
minute mineral particles, and 
remains of siliceous organisms. 
Note the increasing percentage of carbonate of lime with 
the lesser depth. 
*00 %), sponge spicules. 
(2 '00 %), m. di. O^OO mm., 
angular ; sanidine, augite, 
magnetite, glassy volcanic 
particles. 
(45*84 %), amorphous matter, 
fine mineral particles. 
Dredge came, up empty. 
•00 %), Kadiolaria. 
(30^00 %), m. di. 0'80 mm., 
rounded and angular ; grains 
of manganese, red and yellow 
fragments of palagonite, sani- 
dine, augite, pumice. 
(24 •12 %), amorphous matter, 
minute mineral fragments, 
a, few siliceous remains. 
The finer portions of the deposit seem to have been 
washed away in pulling up the tube. The large quan- 
tity of manganese and palagonite is remarkable, and 
accounts for thelarge percentage and size of theminerals. 
Some of the organisms are macroscopic. Dredge empty. 
•00 %), Sponge spicules, Eadio- 
laria, Astrorhizidse, Lituolidse. 
(I'OO %), m. di. 0^08 mm., 
angular ; lapilli, sanidine, 
augite, magnetite, palagonite, 
glassy volcanic particles, a 
few manganese grains. 
(23 •SO %), amorphous matter, 
many fine mineral particles, 
a few fragments of siliceous 
organisms. 
The deposit is remarkably pure as regards the carbonate 
of calcium being chiefly made up of the remains of 
pelagic Foraminifera. Some of the organisms are 
macroscopic. Dredge contained a small quantity of 
the ooze.' 
•00 %), Kadiolaria, a few im- 
perfect red casts of the Fora- 
'minifera. 
(l^OO %), m. di. 0'07 mm., 
angular; monoclinic and tri- 
clinic felspars, augite, horn- 
blende, magnetite, glassy vol- 
canic particles. 
(27 ^57 %), amorphous matter, 
minute mineral and siliceous 
remains.. 
Although the primordial chambers of the Foraminifera 
are abundant, no Coccospheres were observed; Cocco- 
liths are abundant and large. Water-bottle contained 
some ooze, but there was none in the trawl. 
■00 %), Kadiolaria, imperfect 
red casts of pelagic Foramini- 
fera. 
(l^OO %), m. di. 0^06 mm., 
angular ; sanidine, augite, 
magnetite, pumice, man- 
(30 •lO %), amorphous matter, 
fine mineral and siliceous 
remains. 
Note the decrease of carbonate of lime with increasing 
depth, and consequent increase of amorphous matter in 
this and the next sounding. 
ganese grains. 
00 %), Kadiolaria, red imper- 
fect casts of Foraminifera. 
(l^OO %), m. di. 0’06 mm., 
angular ; sanidine, magnetite, 
augite, pumice, manganese 
grains. 
(45 •78 %), amorphous matter, 
many fine mineral particles, 
and remains of Kadiolaria. 
The dredge brought up some concretions covered with 
manganese, two or three sharks’ teeth and valves of 
Scalpcllum also covered with a thin coating of man- 
ganese. The manganese grains found among the residue 
left on treating the deposit with acid were round, and 
had a diameter of about O^l mm. 
00 %), Kadiolaria, Sponge 
spicules, a few imperfect casts 
of Foraminifera. 
( 1 ■OO %), m . di. 0 •OS mm. , angu- 
lar ; monoclinic and triclinic 
felspars, lapilli of basaltic 
rocks, magnetite, augite, 
pumice, brown glassy vol- 
canic particles. 
(39^60 %), amorphous matter, 
fine mineral particles, and 
siliceous remains. 
The deposits are becoming more clayey with increase of 
depth (see next station). 
Tenerife to Sombrero Island — continued. 
