EEPORT ON THE DEEP-SEA DEPOSITS. 
59 
Kesidue. 
Additional Obsekvations. 
Siliceous Organisms. 
Minerals. 
Fine Washings. 
2 '00 %), Eadiolaria, Sponge 
spicules, Astrorhizidae, Litu- 
olidse, imperfect brown casts, 
Diatoms. 
(l^OO %), m. di. 0^10 mm., 
angular ; augite, magnetite, 
felspar, sanidine, lapilh, 
pumice. 
(15 '41 %), amorphous matter, 
minute fragments of minerals, 
Eadiolaria, and Diatoms. 
A few rounded fragments of pumice, from 1 to 6 mm. 
in diameter, were obtained in this deposit ; some 
of these are much altered and decomposed. Much of 
the amorphous calcareous matter is apparently derived 
from Pteropods and Heteropods. 
I'OO %), Eadiolaria, Sponge 
spicules, Astrorhizidae, Litu- 
olidae, a few Diatoms. 
(10^00 %), m. di. O'lO mm., 
angular ; monoclinio and tri- 
clinic felspars, lapiUi, magne- 
tite, augite, quartz, pumice. 
(15'80 %), amorphous matter, 
many fine mineral particles, 
fragments of Eadiolaria and 
Diatoms. 
In the washings of a large quantity of the deposit from 
the dredge there were many shells of pelagic and other 
Molluscs, and a great quantity of pumice, the pieces 
varying from 1 mm. to 6 cm. in diameter. They are 
all of the light-coloured felspathic variety and much 
altered ; some of the fragments are overgrown by 
Serpula and other organisms. 
1-00 %), Eadiolaria, Sponge 
spicules, Astrorhizidae, Litu- 
olidae, a few Diatoms. 
(l^OO %), m. di. O'lO mm., 
angular ; minute fragments 
of volcanic rocks, plagioclase, 
sanidine, magnetite, augite, 
hornblende, volcanic glass. 
(24 ’50%), amorphous matter, 
with minute fragments of 
minerals and siliceous organ- 
isms. 
PulvinvMna menardii appears to be almost, if not quite, 
absent from this deposit,, as well as from most of the 
deposits in this region. 
t‘00 %), Sponge spicules, arena- 
ceous Eoraminifera, 
(20^00 %), m. di. I'OO mm., 
angular ; pumice, magnetite, 
felspar, augite, hornblende, 
sanidine, and many fragments 
of volcanic rocks. 
(7 ■27 %), a small quantity of 
amorphous matter, fine 
mineral particles, and frag- 
ments of siliceous spicules. 
About a bushel of this calcareous sand came up in the 
dredge, mixed with many rounded fragments of 
pumice and volcanic rock, measuring from 1 to 6 cm. 
in diameter. Many of these are completely covered 
with SerpulsR, calcareous Algae, or Polyzoa. Fully 30 
per cent, of the carbonate of calcium is made up by 
the fragments of Polyzoa alone, while Polytreraa 
miniaceitm is very abundant. 
!‘00 %), Eadiolaria, Sponge 
spicules, Astrorhizidae, Litu- 
olidae. Diatoms. 
(60'00 %), m. di. 0'15 mm., 
angular; fragments of volcanic 
rocks, pumice, plagioclase, 
sanidine, black mica, augite, 
magnetite, hornblende. 
(17 '41 %), amorphous matter, 
with many minute fragments 
of minerals, Eadiolaria, and 
Diatoms. 
In the washings from the dredge many Pteropods, Gas- 
teropods, Lamellibranchs, Serpulx, and large quantities 
of broken fragments of Polyzoa were obtained, also 
numerous round and angular fragments of pumice and 
volcanic rocks, from 4 to 6 cm. in diameter. In 
many instances the pumice fragments were completely 
covered with Serpula-tVihes, Algre, and Polytrerita. 
•00 %), Eadiolaria, Sponge 
spicules, Astrorhizidae, Litu- 
olidae, a few Diatoms. 
(5'00 %), m. di. O'lO mm., 
angular; fragments of volcanic 
rocks, pumice, monocliuic and 
triclinic felspars, augite, horn- 
blende, black mica, olivine. 
(41 '78 %), amorphous matter, 
with many minute fragments 
of minerals, and siliceous 
organisms. 
The washings of the mud from the dredge consisted 
chiefly of large Gavolinia trispinosa and other Pteropod 
shells, with many fragments of pumice varying from 
1 mm. to 1 cm. in diameter. 
•00 %), Sponge spicules, frag- 
ments of Eadiolaria, As- 
trorhizidae, LituoUdae. 
(75 '00 %), m. di. 0'20 mm., 
angular; pumice, plagioclase, 
sanidine, augite, magnetite. 
(16 '32 %), amorphous matter, 
with minute fragments of 
pumice and other minerals 
and siliceous organisms. 
The washings, on passing the deposit through sieves, con- 
sisted of fragments of pumice (usually about 3 cm. in 
diameter and smaUer) and Pteropod shells. Many 
of the pumice nodules have Serpulw and Foraminifera 
attached to them. 
( 00 %), Eadiolaria, Sponge 
spicules. Diatoms. 
(20 '00 %), m. di. 0‘15 mm., 
angular ; pumice, fragments 
of volcanic rocks, felspar, 
magnetite, augite, olivine. 
(23 '35 %), amorphous matter, 
with minute fragments of 
pumice, siliceous spicules,'and 
Diatoms. 
The dredge brought up a small quantity of the ooze the 
same as indicated by that in the sounding tube. 
Azores to 
Bermuda to Azo'ces—contimied. Off the Azores. Madeira 
