REPORT ON THE DEEP-SEA DEPOSITS. 45 
Residue. 
Additional Observations. 
/ 
Siliceous Organisms. 
Minerals. 
Fine Washings. 
(I'OO %), a few spicules of Eadio- 
laria. 
(I’OO %), m. di. 0'07 mm., 
angular ; sanidine, magnetite, 
augite, pumice, a few grains 
of manganese. 
(82 '22 %), amorphous matter, 
minute fragments of minerals 
and Eadiolaria. 
The small fragments of quartz covered with limonite, 
believed to be wind-borne, which are very common in 
the soundings on, and to the east side of, the Dolphin 
Eidge, are, apparently, quite absent in this and the 
following soundings on the western side. 
(1 ’00 %), Eadiolaria. 
if 
j 
(I'OO %), m. di. 0’07 mm., 
angular ; fragments of sani- 
dine, augite, magnetite, glassy 
volcanic particles, a few 
manganese grains. 
(96 '51 %), amorphous matter, 
fine mineral particles, and 
broken pieces of Eadiolaria. 
No effervescence was observed on treating a portion with 
dilute acid, and only one or two fragments of pelagic 
Foraminifera were observed on microscopic examina- 
tion. 
(1 '00 %), Sponge spicules, Eadio- 
;i laria, Haplophragmium. 
(I'OO %), m. di. O'lO mm., 
angular ; felspar, magnetite, 
augite, lapilli, fragments of 
pumice. 
(94 '50 %), amorphous matter, 
many minute mineral particles, 
and fragments of siliceous 
organisms. 
The dredge brought up a large quantity of the Eed Clay. 
On passing this through fine sieves many small worm 
tubes [Myrioehele) were found. These were composed 
of the minute mineral particles mentioned and Sponge 
and Eadiolarian spicules ; many of the tubes con- 
tained living worms. Some of the volcanic particles 
are partially transformed into zeolitic matter. 
|(1‘00 %), Eadiolaria, Sponge 
1 spicoles, Haplophragmium. 
(3'00 %), m. di. O'lO mm., 
angular ; felspar, augite, 
hornblende, magnetite, lapilli, 
glassy volcanic particles. 
(93 '56 %), amorphous matter, 
minute mineral particles, 
fragments of siliceous or- 
ganisms. 
The calcareous organisms are much decomposed and 
broken up. 
\'2 ‘00 %), Sponge spicules, Eadio- 
laria, imperfect red and brown 
casts of Foraminifera, Hap- 
! lophragmitim. 
(2 '00 %), m. di. 0'07 mm., 
angular ; monoclinic and 
triclinie felspars, magnetite, 
augite, hornblende, black 
mica, lapilli. 
(15 '31 %), amorphous matter, 
minute fragments of minerals 
and siliceous organisms. 
Most of the finer particles in the deposit appear to be 
fragments of Pteropods and other pelagic Molluscan 
shells. In this respect it differs very considerably 
from a true Globigerina Ooze where the finer particles 
can be observed to be formed chiefly of Coccoliths, 
Ehabdoliths, and the smaller fragments of Globi- 
gerinidae. Very few of the Pteropods are perfect. 
Many of the organisms are macroscopic. 
;2'00 %), Eadiolaria, Sponge 
spicules, Astrorhizidee, Litu- 
oM8e. 
(2' 00 %), m. di. 0'07 mm., 
angular ; sanidine, augite, 
plagioclase, magnetite, lapilli, 
hornblende, a few glassy vol- 
canic fragments. 
(11 '73 %), amorphous matter, 
minute mineral and siliceous 
remains. 
The finer portions of the calcareous material appear to 
be composed chiefly of fragments of Pteropods and 
other pelagic Molluscs. Coccoliths and Ehabdoliths 
are present but rare. A large number of the organ- 
isms are macroscopic. A large quantity of the deposit 
and a large number of animals belonging to all the in- 
vertebrate groups were obtained in the dredgings at 
these depths. 
2 '00 %), Eadiolaria, Sponge 
spicules, Astrorbizidse, Lit- 
uolidae, imperfect brown casts. 
I'OO %), Sponge spicules, and 
imperfect brown casts. 
(I'OO %), m. di. 0'08 mm., 
angular ; quartz, felspar, 
augite, magnetite, mica, 
hornblende. 
(I'OO %), m. di. O'lO mm., 
angular; .sanidine, plagioclase, 
hornblende, augite,magnetite, 
mica. 
(23 '12 %), red amorphous matter, 
fine mineral particles, frag- 
ments of siliceous organisms. 
(29 '12 %), amorphous matter, 
minute mineral particles, a 
few fragments of Sponge 
spicules. 
The washings procured by passing the ooze through fine 
sieves are composed almost entirely of Pteropod and 
Heteropod shells, and a large part of the finer 
portions of the ooze seems to be made up of the com- 
, minuted fragments of the shells of these pelagic 
' Molluscs. The Coccoliths and Ehabdoliths are small 
and rare. Many of the organisms are macroscopic. 
Three hauls were taken with the dredge on this date, 
and yielded a large quantity of the deposit and many 
animals. 
J 
Teiiovife to Sombroi'o Island — continued. Oil' Sombrero Island. St. 'riionuus to Herinnda. 
