THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. G5 



No. 41. Station 4523,* 12th January, 1905. 

 Lat. 3° 34' S.; long. 95° 35.4' W. ; depth, 2031 fathoms. 



GLOBIGERINA OOZE : white, with brownish spots, sHghtly plastic when 

 wet ; chalky and slightly coherent when dried. 



Calcium carbonate : 55.90 per cent, pelagic Foraminifera, including 

 many young individuals, a few bottom-living forms (Rotalidse, Uvigerina), 

 and small Echinoid spines. 



Residue : 44.10 per cent : — 



Siliceous Organisms (0.5 per cent — the actual percentage is much 

 higher, as many broken particles pass off with the " fine washings"), mostly 

 well-preserved Radiolaria belonging to different species, with a few Sponge 

 spicules. Diatoms, and arenaceous Foraminifera. 



Minerals (traces) ; all that can be observed in the sample available for 

 examination are a few insignificant particles of some reddish product of 

 decomposition. 



Fine Washings (43.60 per cent), light-gray flocculent matter, almost 

 entirely formed of the remnants of siliceous organisms ; there is very little 

 actual clay, and the few mineral particles present are too small to be 

 identified. 



No. 42. Station 4717, 13th January, 1905. 

 Lat. 5° 10' S. ; long. 98° 56' W. ; depth, 2153 fathoms. 



Besides the sample from the sounding tube used for the following 

 description, there is a fairly large quantity of material, which had apparently 

 been trawled and subjected to a certain amount of washing ; it is dark gray 

 in color, yellowish on the top, and emits a faint smell of hydrogen sulphide, 

 very pronounced on treatment with hydrochloric acid. Although this gray 

 ooze fills many of the broken shells there are no actual casts. 

 GLOBIGERINA OOZE : light red-brown, plastic, with many Foraminifera 

 visible to the naked eye ; when dried slightly coherent, the lumps break- 

 ing easily. 



Calcium carbonate : 60.30 per cent ; mostly pelagic Foraminifera, with 

 a few bottom-living forms, Echinoid spines, teeth of Fish, and coccoliths. 



Residue : 39.70 per cent : — 



Siliceous Organisms (about 0.1 per cent), principally Radiolaria, arena- 

 ceous Foraminifera, and Diatoms, with a few Sponge spicules. 



Minerals (traces), angular; mean diameter a little over 0.01 mm. ; the 



