426 Proceedings of Royal Society of Edinburgh. [sess. 
Residue [36 - 57%], 
Minerals (2%), small glassy particles and mica (one rounded 
crystal of quartz 0’4 mm. in diameter was observed). 
Siliceous Organisms (2%), Sponge spicules, Radiolaria. 
Fine Washings (32 ’57%), amorphous clayey matter, etc. 
S.S. ‘ Britannia, 5 No. 91, 17th November 1897. Lat. 22° 8' 18" N. y 
long. 71° 1' 54" W., 2994 fathoms. 
The following extract is quoted from the Sounding Report by 
Mr Peake to draw attention to undoubted evidence of a hard 
substance on the bottom at this great depth : — “ New snapper 
came up dented and bent, so that it would not close properly ; 
small specimen of rocky substance in neck of snapper.’ 5 
The material consists of one or two small calcareous fragments,, 
too minute to determine accurately, though they appear to be of 
organic origin. The fragments were submitted by Mr Peake to an 
expert in the British Museum, who writes : “ Small granules com- 
posed of calcite ; it is scarcely possible to determine the source of 
such small particles, — whether of organic or purely mineral origin. 55 
5.5. ‘Britannia, 5 No. 98, 18th November 1897. Lat. 22° 52' N.,, 
long. 70° 27' W., 2975 fathoms. 
RED CLAY, of a brown colour. 
Calcium Carbonate [11*50%], a few pelagic Foraminifera and 
coccoliths. 
Residue [88*50%], brown. 
Minerals (2%), m.di. 0‘06 mm., glassy particles, etc. 
Siliceous Organisms (1%), Sponge spicules. 
Fine Washings (85*5%), amorphous clayey matter and minute 
mineral particles. 
5.5. ‘Britannia, 5 No. 112, 21st November 1897. Lat. 24° 18' 36"jN., 
long. 69° 34' 24" W., 3035 fathoms. 
RED CLAY, brown or dark grey in colour. 
Calcium Carbonate (3%), one or two small bottom-living 
Foraminifera. 
