THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 101 



No. 52. Station 193, 9th December, 1899. 

 Lat. 18° 56.5' S. ; long. 179° 16' W. ; depth, 990 fathoms. 



GLOBIGERINA OOZE : dirty cream colored, coherent. 



Calcium carbonate : 78.15 per cent, pelagic and bottom-living Foram- 

 inifera, Pteropods, Heteropods, Ostracodes, otoliths, Fish teeth, small 

 Lamellibranchs and Gasteropods, Tunicate spicules, coccoliths, rhabdoliths. 

 Residue: 21.85 per cent, brown, flocculent : — 



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



Minerals (8 per cent), angular, mean diameter 0.08 mm., pumice (the 

 largest fragment 10 by 6 by 4 mm.), volcanic glass, felspar, augite, olivine? 

 magnetite. 



Fine Washings (12.85 per cent), amorphous clayey matter, with minute 

 mineral particles and fragments of siliceous organisms. 



No. 53. Station 194, 21st December, 1899. 

 Lat. 12° 43' S. ; long. 179° 50' W.; depth, 1445 fathoms. 



GLOBIGERINA OOZE : dirty cream colored, slightly coherent. 



Calcium carbonate : 84 per cent, pelagic and bottom-living Forami- 

 nifera, coccoliths, rhabdoliths. 



Residue : 16 per cent, reddish brown, flocculent : — 



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

 Minerals (5 per cent), angular, mean diameter 0.08 mm., pumice, vol- 

 canic glass, felspar, augite, magnetite, and manganese grains (the largest 

 about 2 mm. in diameter). 



Fine Washings (10 per cent), amorphous clayey matter, with minute 

 mineral particles and fragments of siliceous organisms. 



From this station twelve rounded fragments of pumice were obtained in 

 the trawl, the largest being 55 by 30 mm. The pieces are partly decom- 

 posed, grayish brown in color, free from manganese. Some are close and 

 fine-grained, others very vesicular. There was also a small fragment of a 

 siliceous sponge. 



No. 54. Station 197, 2nd January, 1900. 

 Lat. 0° 30' N. ; long. 173° 35' E. ; depth, 2221 fathoms. 



GLOBIGERINA OOZE : cream colored, slightly coherent. 



Calcium carbonate : 83.3 per cent, pelagic and bottom-living Forami- 

 nifera, Echinoid spines, otoliths, coccoliths, rhabdoliths. 



