THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 63 
RestpveE: 45.46 per cent, olive brown, slightly greenish : — 
Siliceous Organisms (0.25 per cent approximately), spherical Radiolaria, 
Sponge spicules, and Diatoms. 
Minerals (traces), only manganese grains were recognized in the small 
amount available for examination. 
Fine Washings (45.21 per cent), greenish olive-brown in color when in 
a sufficiently thick layer; under the microscope light-gray clay, with many 
remains of siliceous organisms and a few mineral particles too small for iden- 
tification, except manganese grains. 
No. 37. Station 4715, 2nd January, 1905. 
Lat. 2° 40.4’S.; long. 90° 19.3'W.; depth, 1743 fathoms. 
GLOBIGERINA OOZE: light gray, nearly white, plastic when wet, chalky 
when dry; very little material. 
CaLcIUM CARBONATE: 50 per cent, mostly pelagic Foraminifera, gen- 
erally broken; a few bottom-living forms (Rotalids:), one or two Kchinoid 
spines. 
Resipve: 50 per cent: — 
Siliceous Organisms (traces), Radiolaria, Diatoms, and Sponge spicules 
equally abundant; also one or two arenaceous Foraminifera. 
Minerals (traces), one or two manganese grains, and probably a few 
fragments of augite, having a mean diameter of 0.01 to 0.02 mm. 
Fine Washings (about 50 per cent), light-brown, flocculent clay, with 
many fragments of siliceous organisms; a few extremely minute mineral 
particles. 
No. 38. Station 4520,* 11th January, 1905. 
Lat. 1° 46.8'S.; long. 91° 36’ W.; depth, 1815 fathoms. 
GLOBIGERINA OOZE: the material consists of two layers: one light gray, 
the other light brown, the brown one being more coherent when dried. 
Cacrum CARBONATE (the percentage of calcium carbonate was deter- 
mined in both the gray and the brown ooze, and curiously enough was found 
to be absolutely the same in both cases, viz.: 45.50 per cent): many species 
of pelagic Foraminifera, mostly broken, with a good many KEchinoid spines, 
a few Fishes’ teeth, and bottom-living Foraminifera (Rotalidee and Miliolide). 
ReEsIDUE: 54.50 per cent, rich brown : — 
Siliceous Organisms (0.10 per cent approximately), Radiolaria, Diatoms, 
Sponge spicules, and arenaceous Foraminifera are equally abundant. 
