G62 DR J. H. HARVEY PIRIE ON DEEP-SEA DEPOSITS 



and clear plagioclase), a little biotite and chlorite, one or two grains of pumice, 

 magnetite, and (?) garnet. A few glauconite grains. 



Fine washings 29 per cent. :— Small angular mineral particles, fragments of diatoms, 

 and a little amorphous matter. 



Chief foraminifera : — Hyperammina ramosa, Reophax diffiugiformis, Haplo- 

 phragmium agglutinans. Clavulina communis, Spiroplecta hiformis ; none of them 

 abundant. 



266. Station 338; November 28, 1903; 18 to 20 hours; lat. 59° 23' S., long. 

 49° 08' W. ; depth 2180 fathoms. 



Diatom Ooze or Volcanic Sand. — A soft greenish-brown mud. Preserved in 

 spirit, and in the bottle has sorted out into layers, light in colour on top, dark mineral 

 layer on the bottom. Not much cohesion, being very easily rubbed down, leaving a 

 residue of fine sand composed of a mixture of grey and dark, almost black grains, with 

 some glittering flakes of mica. The lighter, more superficial part has a floury feeling. 



CaCO^ : — A trace. 



Siliceous organisms 15 per cent. : — Diatoms, radiolaria, a few sponge spicules. 



Minerals 60 per cent., m. di. 0*1 mm., sub-angular, rounded, and angular : — Quartz 

 (not volcanic), many fragments of brown basaltic glass with felspars and magnetite, 

 cloudy felspars, magnetite, augite, brown hornblende, green hornblende, palagonite, a 

 few chlorite scales on quartz grains, garnet. 



Fine washings 25 per cent. : — Chiefly fragments of diatoms, also minute mineral 

 particles. 



CJiief foraminifera : — Rhizammina alg^formis, Reophax difflugiformis, Ammo- 

 baculites agglutinans, Gaudryina pseudofliformis, Glohigerina hulloides (dwarfed), 

 G. duterbrei, G. pachyderma ; none of them abundant. 



27. Station 339; November 29, 1903; lat. 58° 28' S., long. 51° 56' W. ; depth 

 2168 fathoms. 



Diatom Ooze (?) or Volcanic Sand. — Valves of the sounding-tube remained open 

 so that the deposit must have been much washed coming up. The deposit may have 

 been a Diatom ooze, but it does not seem likely that the diatoms could have been so 

 completely washed out if it were. As obtained, it is a brownish-green earthy sand. To 

 the naked eye it seems more mineral and rock particles than mud. 



Minerals 80 per cent., a mixture of fine grey sand, m. di. O'l mm., and gravel up 

 to 10 mm., mean about 1'5 mm., sub-angular and angular. Much dark volcanic glass, 

 pumice, palagonite, magnetite, quartz with limonite coating many of the grains, 

 felspar, some cloudy but chiefly clear, brown hornblende, augite, green hornblende. 



Fine washings 20 per cent. : — Fine mineral particles and some diatoms. 



28. Station 342; November 30, 1903; lat. 56° 54' S., long. 56° 24' W. ; depth 

 1946 fathoms. 



