18 THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 
Islands the deposit was Globigerina Ooze in 1700 fathoms, and again under 
the equator in 1418 fathoms, and close to Galapagos in 633 fathoms. On 
the voyage from the Galapagos Islands to Aguja Point, a deep sounding 
in 2235 fathoms gave a Red Clay, and nearer the coast, in 1036 fathoms, 
a Green Mud was taken. On the voyage from Aguja Point out into open 
water and thence to Callao, Red Clay was found in depths of 2370, 2600, 
9845, 2338, and 3120 fathoms, and Blue Mud was found at 1490 and 1949 
fathoms. On the voyage from Callao to Easter Island, the deposit 
was mostly Red Clay, except that at 2200 fathoms, i dat. 21°. 58 &., 
long. 96° W., a Globigerina Ooze was met with, but approximating to the 
Red Clay, since the percentage of calcium carbonate was only 34. On 
approaching Sala y Gomez, Globigerina Ooze was again met with in 1939 
fathoms, with Volcanic Sand close to Easter Island. After leaving Haster 
Island, the expedition apparently ran along the border-line between Red 
Clay and Globigerina Ooze, although the depths varied little; thus at 2020 
fathoms, in lat. 25° 22’ §., the percentage of calcium carbonate was 62; 
then in 2188 fathoms (lat. 23° 24’ 8.) the percentage fell to 11, rising again 
to 33 at 2168 fathoms (lat. 21° 39’ S.), falling again to 12 at 2265 fathoms 
(lat. 19° 11’ S.), and rising again to 41 at 2228 fathoms (lat. 17° 18’ 8.), 
whence proceeding northwards the Globigerina Ooze became typical with a 
high percentage of calcium carbonate, and continued all the way until the 
Galapagos Islands were approached. On the passage from the Galapagos 
Islands to Manga Reva, the bottom was covered with Globigerina Ocze, 
except for a most unusual sample from 2285 fathoms (lat. 6° 30’ S., 
long. 101° 17’ W.), where a Red Clay containing no calcium carbonate 
was found. At the two stations on each side, the deposit was Globigerina 
Ooze, containing 60 per cent of calcium carbonate in 2153 fathoms, and 
75 per cent of calcium carbonate in 2084 fathoms. One is almost inclined 
to conclude that this sample does not represent the deposit at the bot- 
tom, but that the shells of Foraminifera have in some way been re- 
moved, leaving only what we call “fine washings” in the bottle. 
Immediately after leaving Manga Reva on the voyage to Acapulco, a 
sounding was taken in 9225 fathoms (lat. 21° 4’ S., long. 133° MW); 
where, according to Dr. Agassiz’s preliminary report, the deposit was: “ Red 
clay mud, many mineral particles, very few Globigerine, no Radiolaria or 
Diatoms.? The material received is very peculiar, being mostly made up 
of amorphous calcium carbonate, and is quite unlike the deposit usually 
