REPORT ON THE DEEP-SEA DEPOSITS. 
Residue. 
Additional Obseevations. 
Siliceous Organisms. 
Minerals. 
Fine Washings. 
Small mineral particles. 
Much amorphous clayey matter. 
On this occasion the first sounding and dredging were 
taken by the Challenger ; they were quite successful, 
the dredge bringing up several Echinoderms and Crus- 
taceans, but this and several of the subsequent sound- 
ing-s were trials of the apparatus, and frequently none 
of the deposit was obtained or preserved. 
In each of these soundings the tube brought up no indi- 
cation of the nature of the bottom. The dredge, which 
was put over in 1000 fathoms, came up empty. 
... 
Both the sounding line and dredging line broke in 
heaving in. 
(40 '00%), Sponge spicules, As- 
trorhizidae, Haplophragmiuvi, 
glauconitic casts, a few Dia- 
toms. 
(10 '00%), Quartz, mica, felspar, 
glauconite. 
(10'00%), Amorphous matter, 
mineral and siliceous re- 
mains. 
Over one hundredweight (50 kilogrammes) of this deposit 
was obtained by the dredge. The percentages have 
been approximated, there being too little preserved 
for analysis. Light green glauconitic casts of the 
Foraminifera remained after treatment with acid. 
The dredge brought up mud much the same as at 470 
fathoms, which was twenty-five miles further east. 
1 
1 
Many mineral particles with 
glauconite. 
Amorphous matter. 
These deposits contained a good deal of glauconite, but 
none was preserved for subsequent examination. 
(10 "00 %), Sponge spicules, glau- 
conitic casts. Diatoms. 
(40 '00 %), m. di. 0'20 mm., 
angular; quartz, felspar, glau- 
conite, mica, magnetite. 
(18 ’19 %), many minute mineral 
particles, clayey and organic 
matter. 
The shells of the larger organisms in this deposit are 
fragmentary. Many beautiful glauconitic casts of Fora- 
minifera and other organisms remained after treatment 
with dilute hydrochloric acid. 
(5 '00 %), glauconitic casts and 
a few siliceous spicules of 
Sponges. 
(lO'OO %), m. di. O'lO mm., 
angular ; quartz, dark and 
pale glauconite, felspar, mica, 
magnetite. 
(66 '00 %), amorphous matter, 
fine mineral particles and 
minute fragments of siliceous 
spicules. 
This deposit contains much amorphous clayey matter. 
All the Foraminifera are very small and much broken. 
Glauconitic matter is less abimdant than at previous 
stations. 
(3 ‘00 %), a few glauconitic casts, 
arenaceous Foraminifera, and 
siliceous Sponge spicules. 
(5 '00 %), m. di. 0'07 mm., 
angular; quartz grains, mica, 
felspar, a few glauconitic 
particles, tourmaline, a few 
glassy volcanic fragments. 
(65 '50 %), amorphous matter 
and numerous fine mineral 
particles. 
Some two or three bright green imperfect casts of Fora- 
minifera remained after treatment with dilute acid. 
Coccoliths are abundant and large. 
(1 ’00 %), siliceous Sponge spicules, 
arenaceous Foraminifera, a few 
glauconitic casts. 
(5 '00 %), m. di. 0'06 mm., 
angular ; felspar, mica, some 
glassy volcanic particles, one 
or two quartz and glauconitic 
grains. 
(65'14 %), amorphous matter, 
many minute mineral par- 
ticles. 
One or two dark green glauconitic casts of Foraminifera 
remained after treatment with dilute acid. Coccoliths 
are abundant and large. 
(I’OO %), a few siliceous Sponge 
spicules, Ehabdammina. 
(10 '00 %), m. di. 0'06 mm., 
angular ; felspar, augite, horn- 
blende, mica, magnetite, 
quartz, tourmaline, a few 
glassy volcanic fragments. 
(69 '12 %), amorphous matter, 
many fine mineral particles, 
a few minute fragments of 
siliceous organisms. 
No glauconitic matter observed in this deposit, although in 
shallower water nearer shore it is relatively abundant. 
(2’00 %), glauconitic casts. 
Sponge spicules, Haploph- 
ragmium. 
(25'00 %), m. di. 0'08 mm., 
angular and rounded ; quartz, 
felspar, mica, magnetite, au- 
gite, glauconite, glassy volcanic 
fragments. 
(54 '12 %), amorphous matter, 
many fine mineral particles 
and minute fragments of 
siliceous organisms. 
The mineral particles of this deposit are angular, except 
the glauconite and some of the large quartz grains, 
which are more or less rounded. Many glauconitic 
grains and casts of Foraminifera and other organisms 
remained after treatment with dilute acid, chiefly of a 
dark green colour. 
England to Gibraltar. 
