68 THE DEPTH AJSTD MARINE DEPOSITS OF THE PACIFIC OCEAN. 



Calcium carbonate : 68.01 per cent, pelagic Foraminifera, with a few 

 bottom-living forms (Kotalidse) ; the more porous shells are colored light 

 brown by limonite. 



Kesidue: 31.99 per cent; the residue consists essentially of "fine wash- 

 ings," nothing being left after careful decantation. 



Siliceous Organisms, per cent. 



Minerals, per cent. 



Fine Washings (31.99 per cent), brown clay, remarkably rich m 

 minute manganese grains and earthy limonite, with a very few remains of 

 siliceous organisms (Diatoms and Sponge spicules), and mineral particles 

 much too minute for identification. 



No. 46. Station 4736, 23rd January, 1905. 

 Lat. 19° 0.4' S.; long. 125° 5.4' W. ; depth, 2289 fathoms. 



GLOBIGERINA OOZE: dark chocolate-brown, plastic and sticky in the 

 wet state, but not very coherent when dried. 



Calcium carbonate : 50 per cent, pelagic Foraminifera, with a few 

 bottom-living forms (RotalidEe) and a good many Fishes' teeth. 

 Residue : 50 per cent : — 



Siliceous Organisms (traces), a very few Sponge spicules and Radiolaria. 



ilfmcrafe (traces), angular ; mean diameter 0.1 mm.; augite, plagioclase, 

 magnetite, and a reddish product of decomposition, with a good many small, 

 well-formed, elongated crystals of phillipsite with pyramidal terminal faces, and 

 a few manganese grains. 



Fine Washings (50 per cent), chocolate-brown clay, the brown color 

 being due to manganese oxide, with a few mineral particles and remnants of 

 siliceous organisms. 



No. 47. Station 4525,* 25th January, 1905. 

 Lat. 21° 36.1' S. ; long. 131° 35.3' W. ; depth, 2123 fathoms. 



GLOBIGERINA OOZE: dark brown, with •yellow patches, plastic when 

 wet ; forms when dried hard lumps crumbling under the action of water. 



Calcium carbonate : 65.90 per cent, pelagic Foraminifera, with a few 

 bottom-living forms (Rotalidaj). 



Residue : 34.10 per cent : — 



Siliceous Organisms (small traces), very few Sponge spicules and 

 Radiolaria. 



