REPORT ON THE DEEP-SEA DEPOSITS. 
37 
Kesidub. 
Additional Obsekvations. 
Siliceous Organisms. 
Minerals. 
Fine Washings. 
Sponge spicules and Diatoms. 
Quartz, felspar, glauconite, mica, 
magnetite. 
Amorphous clayey and organic 
matter. 
The deposits in these soundings were nearly the same as 
at 560 fathoms on January 14 (Station IId), but none 
was preserved for subsequent examination. From 900 
fathoms the dredge came up full of mud. 
(2 "00 %), a few Radiolaria and 
Sponge spicules, one or two 
arenaceous Foraminifera, a few 
imperfect casts. 
(2'00 %), m. di. 0'06 mm., 
angular; felspar, augite, horn- 
blende, tourmaline, glassy 
volcanic particles, quartz 
sometimes rounded. 
(29 '16 %), amorphous matter, 
many minute fragments of 
minerals and siliceous organ- 
isms. 
A few imperfect casts of pelagic Foraminifera remained 
after treatment with dilute acid. Only one or two of 
the organisms are macroscopic. 
No deposit obtained; line carried away. 
(I'OO %), a few Radiolaria, 
Sponge spicules, Lituolidae. 
(5'00 %), m. di. 0'07 mm., 
angular ; lapilli, felspar, 
augite, magnetite, glassy vol- 
canic fragments, pumice. 
(26 '46 %), ferruginous amor- 
phous matter, fragments 
of minerals and fine por- 
tions of siliceous organ- 
isms. 
A few particles of volcanic rocks measured 0'15 mm. 
in diameter or larger. Much magnetite and many 
brown altered glassy particles were observed. 
Deposit quite similar to the next. Trawl brought up 
several specimens. 
(I'OO %), Radiolaria, a few 
; Sponge spicules, ffaplophrag- 
mium. 
(3'00 %), m. di. 0'06 mm., 
angular ; quartz, felspar, 
lapilli, augite, glassy volcanic 
fragments. 
(21 '23 %), amorphous matter, 
many minute mineral parti- 
cles and fragments of silic- 
eous organisms. 
Among the minerals were a few rounded quartz grains, 
some of which were covered with limonite. 
I (I'OO %), Radiolaria, Sponge 
spicules, Hyperammina, Hap- 
lophragmium, a few imperfect 
j casts. 
(5 '00 %), m. di. 0'13 mm., 
rounded and angular ; frag- 
ments of volcanic rocks, 
plagioclase, magnetite, ortho- 
clase, manganese grains, 
augite, olivine, glassy vol- 
canic particles, quartz, horn- 
blende. 
(40 '87 %), amorphous matter, 
minute fragments of minerals 
and siliceous organisms. 
A few brown casts of the Foraminifera remained 
after treatment with dilute acid. The Coccoliths are 
notably large. 
1 Sponge spicules. 
(I'OO %), m. di. 0'25 mm., 
angular and rounded ; basaltic 
rock fragments, glassy vol- 
canic particles, olivine, 
augite, magnetite, felspar. 
(2'73 %), fine mineral fragments 
and some 'amorphous matter. 
The organisms and minerals had mostly a slight coating 
of manganese. Some fragments ofrocks measured nearly 
1 cm. in diameter. 
(1 '00 %), a few Sponge spicules. 
(40 '00 %), m. di. 0'07 mm., 
angular ; lapilli of vesicular 
basalt, felspar, augite, mag- 
netite, olivine, glassy volcanic 
particles. 
(20 '60 %), fine fragments of 
minerals, amorphous matter, 
and a few minute fragments 
of Sponge spicules. 
Some of the Gasteropoda, Lamellibranchs, Pteropods, and 
Heteropods in this deposit are macroscopic ; much 
olivine and magnetite present. 
(I'OO %), Sponge spicules, As- 
trorhizidffi. 
(15 '00 %), m. di. 0'06 mm., 
angular ; numerous lapilli of 
vesicular basalt, augite, mag- 
netite, felspar, glassy volcanic 
particles. 
(54'80 %), amorphous matter, 
many small fragments of 
minerals, a few fragments of 
siliceous organisms. 
’ 
Englaiul to tJibral- 
t&v— continued. Gibraltar to Madeira, Oil' Madeira. 
