88 THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 



No. 19. Station 31, 19th September, 1899. 

 Lat. 12° 20' S. ; long. 144° 15' W. ; depth, 2700 fathoms. 



RED CLAY : dark chocolate colored, coherent. 



Calcium cakbonate : 8 per cent, pelagic and bottom-living Forami- 

 nifera (mostly fragmentary). Fishes' teeth, coccoliths. 

 Residue : 92 per cent, chocolate colored : — 



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

 Foraminifera. 



Minerals (5 per cent), angular, mean diameter 0.1 mm., phillipsite 

 (abundant, in isolated crystals, and in aggregations), manganese grains, mag- 

 netite, palagonite, plagioclase, augite. 



Fine Washings (86 per cent), amorphous clayey matter, with many 

 minute phillipsite crystals, and other mineral particles. 



No. 20. Station 32, 20th September, 1899. 

 Lat. 13° 37' S. ; long. 145° 42' W. ; depth, 2451 fathoms. 



RED CLAY: dark chocolate colored, coherent. Manganese nodule one 

 inch by half an inch. 



Calcium carbonate: 21.4 per cent, fragments of pelagic and bottom- 

 living Foraminifera, Echinoid spines, Fish teeth, coccoliths, and small cal- 

 careous horseshoe-shaped bodies. 



Residue : 78.6 per cent, chocolate colored : — 



Siliceous Organisms (1 per cent). Sponge spicules, arenaceous Fora- 

 minifera. 



Minerals (10 per cent), angular and rounded, mean diameter 0.1 mm., 

 phillipsite (in individuals, twins, stellate, and subspherical groups, the last 

 mentioned 1 mm. in maximum diameter), palagonite, decomposed olivine, 

 decomposed plagioclase, augite, manganese grains, magnetite, and a small 

 cosmic spherule, 0.03 mm. in diameter. 



Fine Washings (67.6 per cent), amorphous clayey matter, with small 

 phillipsite crystals, etc. 



No. 21. Station 33, 20th September, 1899. 

 Lat. 14° 10' S. ; long. 146° 10' W. ; depth, 2527 fathoms. 



RED CLAY : very dark chocolate color, almost black, coherent. 



Calcium carbonate : 3.5 per cent, bottom-living Foraminifera and 

 minute fragments of pelagic Foraminifera. 



