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



CaCO^ 5 per cent. : — Forarainifera. These appear to be more abundant in the 

 upper layers than in the deeper portions of the sample. The lot from which the 

 percentage of CaCOg was estimated came from the top layers. Deeper layer I per 

 cent. (Anal.). 



Siliceous organisms, trace : — Sponge spicules. 



Minerals 20 per cent., m. di. 0*08 mm., angular and sub-angular chiefly, a fair 

 number of larger quartz grains, one about 5 mm, long, smooth and polished, and 

 showing distinct striae :- Quartz, jasper, felspar (orthoclase, plagioclase, and microcline, 

 one piece 2 mm. long), dark mica, green hornblende, magnetite, tourmaline, augite ; one 

 piece of angular gneissic quartz-hornblende rock, 1 cm. long, stained black with 

 manganese. 



Fine washings 75 per cent. :— Fair amount of amorphous clay. Minute mineral 

 particles not markedly of the No. 32 type, as a considerable proportion of them are 

 between 0"01 and 0*05 mm. in size. 



Chief forarainifera : — Glohigerina dutertrei, G. hulloides, and G. duhia, 

 Truncatulina wuellerstorfi, and Pullenia sphwroides. 



42. Station 422; March 23, 1904; lat. 68° 32' S., long. 12° 49' W. ; depth 2660 

 fathoms. 



Glacial Clay. — A light brown unctuous clay similar in character to No. 41. 



CaCO^ .-—Nil. 



Siliceous organisms, trace : — Sponge spicules. 



Minerals 20 per cent., m. di. 0'07 mm., angular and sub-angular, one piece of 

 hornblende 2 mm. long : — Quartz, mica, hornblende, a little volcanic glass, felspar, 

 mostly plagioclase, magnetite, augite, tourmaline, garnet, serpentine, palagonite, olivine. 



Fine washings 80 per cent. : — Of No. 32 type. 



43. Station 428; March 27, 1904; lat. 66° 57' S., long. 11° 13' W. ; depth 2715 

 fathoms. 



Glacial Clay. — Light brown in colour. Somewhat flocculent, very smooth, almost 

 no grittiness, not very unctuous except the final portions when rubbing down, which 

 require almost as much rubbing as does a Red clay to break it up completely. 



CaCO^ .-—Nil. 



Siliceous organisms, trace : — Sponge spicules. 



Minerals 5 per cent., angular and sub-angular, m. di. 0"07 mm. : — Quartz, some 

 grains with a limonite coating, felspar, green hornblende, augite, magnetite, zircon, 

 mica, tourmaline. 



Fine ivashings 95 per cent. : — Considerable quantity of amorphous clay. Many 

 minute mineral particles, a large proportion of them under 0001 mm. in size. 



44. Station 432a; March 30, 1904; lat. 61° 21' S., long. 13° 02' W. ; depth 2764 

 fathoms. 



