THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 99 



Fine Washings (55.5 per cent), amorphous clayey matter, with many 

 small mineral particles. 



No. 47. Station 173, 4th November, 1899. 

 Lat. 18° 55' S. ; long. 146° 23' W. ; depth, 2440 fathoms. 



A large quantity of Red Clay, containing many manganese nodules, 

 sharks' teeth, etc., was obtained by the trawl. No deposit from the sound- 

 ing-tube was received, so the following description is prepared from clay 

 from the trawl. 

 EED CLAY : dark brown or chocolate colored. 



Calcium carbonate : 1 per cent, a few pelagic and bottom-living For- 

 aminifera. Fish teeth, fragment of Gasteropod shell, and one or two 

 coccoliths observed. 



Eesidue : 99 per cent, chocolate colored : — 



Siliceous Organisms (1 per cent), Sponge spicules, Radiolaria. 



Minerals (25 per cent), mean diameter 0.15 mm., angular and rounded, 

 volcanic glass, Pele's hair, palagonite, pumice, olivine, manganese grains, 

 magnetite, plagioclase, augite, cosmic spherules, many tuff fragments, and 

 manganese grains of large size. 



Fine Washings (73 per cent), amorphous clayey matter, with many 

 minute minerals. 



No. 48. Station 182, 23rd November, 1899. 

 Lat. 18° 59' S. ; long. 164° 47' W. ; depth, 2882 fathoms. 



RED CLAY : reddish brown, coherent, clayey. 

 Calcium carbonate : per cent. 

 Residue : 100 per cent : — 



Siliceous Organisms (1 per cent), fragments of Radiolaria. 

 Minerals (1 per cent), angular, mean diameter 0.08 mm., pumice, mag- 

 netite, manganese grains. 



Fine Washings (98 per cent), amorphous clayey matter, with minute 

 mineral particles. 



No. 49. Station 186, 27th November, 1899. 

 Lat. 21° 18' S. ; long. 173° 51' W. ; depth, 4540 fathoms. 



RED CLAY : brown, clayey, coherent. 

 Calcium carbonate : per cent. 



