92 THE DEPTH A2TD MARINE DEPOSITS OE THE PACIEIC OCEAN. 



No. 29. Station 68, 27th September, 1899. 

 Lat. 16° 57' S. ; long. 148° 58' W. ; depth, 2224 fathoms. 



RED CLAY : grayish-brown, coherent, clayey. 



Calcium carbonate : 27.75 per cent, pelagic and bottom-living Forami- 

 nifera, Fishes' teeth, Ostracodes, Echinoid spines. 



Residue: 72.25 per cent, brown, flocculent, with heavy mineral 

 particles : — 



Siliceous Organisms (2 per cent), arenaceous Foraminifera, Radiolaria, 

 Sponge spicules. Diatoms. 



Minerals (30 per cent), angular, mean diameter 0.1 mm., augite, olivine, 

 magnetite, felspar (plagioclase), hematite, chloritic mineral, biotite ( 1 or 

 2 flakes). 



Fine Washings (40.25 per cent), amorphous clayey matter, with minute 

 mineral particles, etc. 



No. 30. Station 70, 27th September, 1899. 

 Lat. 17° 21' S. ; long. 149° 15' W. ; depth, 1585 fathoms. 



VOLCANIC MUD : dark grayish-brown, coherent, clayey, slightly gritty 

 to the touch. 



Calcium carbonate : 20.2 per cent, pelagic and bottom-hving Forami- 

 nifera, Echinoid spines, Ostracodes, coccoliths, rliabdoliths. 



Residue : 79.8 per cent, brown, flocculent, with a great many mineral 

 particles : — 



Siliceous Organisins (2 per cent), arenaceous Foraminifera, Radiolaria, 

 Sponge spicules. 



Minerals (50 per cent), angular, mean diameter 0.12 mm., olivine, 

 augite, magnetite, hematite, chloritic mineral, felspar, volcanic glass. 



Fine Washings (27.8 per cent), amorphous clayey matter, with a large 

 amount of minute mineral particles. 



No. 31. Station 74, 5th October, 1899. 

 Lat. 17° 28.4' S. ; long. 149° 34' W. ; depth, 807 (?) fathoms. 



VOLCANIC MUD: grayish-black, coherent, clayey; on treatment with 

 dilute hydrochloric acid a strong smell of sulphuretted hydrogen is given 

 off, due to organic matter (portions of leaves, bark of trees, etc.). 



Calcium carbonate : 30 per cent, pelagic and bottom-living Foraminifera, 



