262 J. Murray on Sea-bottom Deposits. 
other soundings in the same region as to depth. In the first 
case we might bring in elevation to account for the Globigerina- 
red clay overlying a deposit with many (lobigerme in it by 
supposing a depression of the bottom after the latter had been 
laid down; or we may believe that agencies are now removing 
carbonate of lime from the surface-layer, and that these were 
not active in some past time. 4 
is deposit occurs, in one sounding, in the Pacific at a 
depth of 2925 fathoms in mid-ocean. In the eastern part 0! 
the Atlantic it occurs also at great depths. 
The following is a list of the depths at which we have found 
a Globigerina-ooze :— 
Atlantic Ocean. 
fms. 8 
s. ims. 
1090 1900 2200 1350 1425 2275 
1525 1950 1675 900 1650 2475 
Southern Ocean. 
fms. fm 3 E fms. fms. 
1900 1570 1375 1600 1800 2150 
Pacifie Ocean. 
1974 1350 1675 2925 1915 1500 
400 1400 1850 2075 
8. Radiolarian Ooze-—Organisms with the siliceous skeletons 
abound in the surface-waters, and apparently also in the d oh 
waters, of all the oceans and seas we have visit The ské 
etons of these organisms are found in all, or alm 
sea-bottoms. Even in those cases where at firs 
* They are, however, much more numerous in the Pacific than in the 4 
especially in the equatorial waters. 
