THE DEPTH ASD MAEDTE DEPOSITS OF THE PACIFIC OCEAX. 73 



organisms, apparently calcareous Sponges, in the shape of flat slabs formed 

 by the agglomeration of twelve-pointed spicules, but easily crumbling under 

 pressure ; the spicules are all joined to each other, so that there is ver}- httle 

 space between them, the whole body being thus rather compact, though not 

 strong. 



Residue : 36.38 per cent : — 



Siliceous Organisms (traces), a few large Eadiolaria and Diatoms remain 

 in the coarser part of the residue, but most of the siliceous remains pass 

 off with the '•' fine washings," of which they constitute a large part. 



Minerals (0.20 per cent), angular, varying from 0.01 to 0.10 mm. in 

 diameter; felspar, manganese grains, brown decomposed particles, appar- 

 ently decomposed augite. and a few volcanic glass fragments. 



Fine Washings (36.18 per centi, light-brown clay, with many fragments 

 of siliceous organisms, and minute mineral particles. 



No. 58. Station 45i0,* ITth February. 1905. 

 Lat. 3° 25.6' N. ; long. 115= bV "W. ; depth, 2200 fathoms. 



when dried. 



CALCiTir CARBONATE : 69 per cent, pelagic Foraminifera. with a few 

 bottom-living forms (Rotalidse), and small Echinoid spines. 

 Residue : 31 per cent : — 



Siliceous Organisms (0.10 per cent), Radiolaria, Diatoms, and Sponge 

 spicules ; many siliceous remains pass off with the '' fine washings," of which 

 they make up perhaps one-half the volume. 



Jlinerals (traces); a few particles of magnetite and limonite were 

 observed. 



Fine Washings (30.90 per cent), flocculent. brown, clayey matter, with 

 many fragments of siliceous organisms, and a few mineral particles too 

 minute for identification. 



No. 59. Station ibU* 18th February. 1905. 

 Lat. 4° 55' N. ; long. 112^ 27' TV.; depth, 2174 fathoms. 



GLOBIGERINA OOZE : dark gray, slightly reddish, rather sticky, but inco- 

 herent when dried ; the Foraminifera shells are not quite fresh, being gener- 

 ally impregnated with clayey matter. 



