62 THE DEPTH AJSTD MARINE DEPOSITS OF THE PACIFIC OCEAN". 



hydrochloric acid, the insoluble portion turning white, and manganese and 

 iron passing into solution. 



Siliceous Organisms (traces), spherical Radiolaria, Sponge spicules, and 

 different species of arenaceous Foraminifera, all equally represented, and 

 more abundant than the mineral particles. 



Minerals (hardly any — the washing of 30 grams of substance amounts 

 to no more than one or two centigrams). The very few particles are angular, 

 and have a mean diameter of 0.15 mm. ; plagioclase, manganese grains, and 

 hematite were observed. 



Fine Washings (21.90 per cent), brown flocculent clay, with manganese 

 grains, and fragments of siliceous organisms. 



No. 35. Station 4711, 31st December, 1904. 

 Lat. 7° 47.5' S.; long. 94° 5.5' W.; depth, 2240 fathoms. 



GLOBIGERINA OOZE : brown, earthy, with little plasticity, containing 

 Foraminifera visible to the naked eye. 



Calcium carbonate : 54.54 per cent, principally pelagic Foraminifera, 

 with a few bottom-living forms, and Fishes' teeth. 

 Residue : 45.46 per cent, rich brown : — 



Siliceous Orcjanisms (traces), mostly Radiolaria, with a few Sponge spic- 

 ules and arenaceous Foraminifera. Though Radiolaria, as individuals, are 

 numerous, they would, if estimated by weight, amount to a very small frac- 

 tion of 1 per cent. 



Minerals (traces), manganese grains of various sizes (up to 2 mm. in 

 diameter), and small angular fragments of felspar, were observed. 



Fine Washings (45.46 per cent), brown flocculent clay, with many frag- 

 ments of siliceous organisms, and a few mineral particles too small to be 

 identified, except manganese grains. 



No. 36. Station 4713, 1st January, 1905. 

 Lat. 5° 35.3' S.; long. 92° 21.6' W.; depth, 2191 fathoms. 



GLOBIGERINA. OOZE : according to the preliminary report there was a 

 light-brown ooze at the top of the cylinder, and a light-gray ooze below, but 

 only a small quantity of the two layers mixed was received ; the ooze is 

 somewhat plastic when wet, incoherent when dry. 



Calcium carbonate : 54.54 per cent, many pelagic Foraminifera and a 

 few Echinoid spines. 



