OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 665 



magnetite. Some fragments of white sandstone, the grains of it having a limonite 

 coating, also fragments of greenish slate. 



Fine tvashings 78 per cent. : — A fair amount of true amorphous clayey matter. 

 The minute mineral particles are, on the whole, distinctly larger than those of No. 32. 



34. Station 411; March 10, 1904; lat. 74'^ 01' S., long. 22° 00' W. ; depth 161 

 fathoms. 



Pebbles. — ^Three pebbles brought up in the snapper sounding-lead. No mud 

 adherent to them. 



(1) A piece of mica schist containing garnets and iron pyrites l"2x "9 x '7 inch, 

 sub-angular, smoothed on two sides. 



(2) Piece of brownish-pink sandstone, "8 x "G x "3 inch ; sub-angular, composed of 

 well-rounded quartz grains from O'lo to 0'3 mm. in diameter, many of them coated 

 with limonite, bound together by a calcareous matrix. 



(3) Piece of dark hornblende gneiss, '7 x '&x "5 inch, sub-angular. 



35. Station 414; March 15, 1904; lat. 71° 50' S., long. 23° 30' W. ; depth 2102 

 fathoms. 



Glacial Mud or Clay. — A brownish-grey mud with a certain amount of greasy 

 clayey feel about it, but it breaks down in water without very much rubbing. Very 

 little grittiness. 



CaCOg .-—Nil. 



Siliceous organisms, a trace : — Sponge spicules. 



Minerals 25 per cent., angular, m, di, O'OG mm., typical "rock-flour," very few 

 large pieces : — Quartz, mostly clear, some grains coated with limonite, a few rather 

 larger grains with what looks like chlorite scales, flakes of brown mica, felspar, 

 hornblende (green and brown), augite, magnetite, olivine, chlorite, tourmaline. 



Fine tvashings 75 per cent. : — Chiefly fine mineral particles, only a moderate 

 amount of amorphous clay. 



36. Station 415 ; March 16, 1904; lat. 71° 28' S., long. 22° 32' W. ; depth 2338 

 fathoms. 



Glacial Mud or Clay. — Only scrapings off the outside of the sounding-tube. 

 There was no valve at the top of the sounding-tube, and so the plug of mud had all 

 escaped. Brownish when wet, slaty-grey when dry. Microscopically it consisted 

 almost entirely of " fine washings," mostly amorphous clay ; but as it must have been 

 washed on the way up, it cannot be regarded as in any way representative of the 

 condition of the deposit in situ. 



37. Station 416; March 17, 1904; lat. 71° 22' S., long. 18° 15' W. ; depth 2370 

 fathoms. 



