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



Glacial Mud or Clay. — A greenish- grey mud, otherwise very similar in character 

 to No. 35. 



CaCO^, a trace : — Ostracod valve. 



Siliceous organisms, a trace : — Sponge spicules and radiolaria. 



Minerals 15 per cent., angular, m. di. 0"06 mm. : — Quartz, magnetite, brown mica, 

 some flakes up to 1"5 mm., these three making up the main bulk of the mineral 

 particles ; some augite, volcanic glass, felspar, mostly kaolinised, olivine, garnet, some 

 glauconitic grains. 



Fine washings 85 per cent. : — Similar to No. 35 in character. 



Chief for aminif era : — Cyclammina pusilla, Reophax nodulosa, Psammosphasra 

 fusca, Go7'diammi7ia charoides, Haplophragmoides scitulurn. 



38. Station 417; March 18, 1904; lat. 71° 22' S., long. 16° 34' W. ; depth 1410 

 fathoms. 



Glacial Mud or Clay. — Of a greenish-grey colour, light grey when dry. Not 

 very tenacious ; a distinctly greasy, clayey feeling, but rubs down fairly easily. 

 Similar in this respect to Nos. 35 and 37. Rather gritty from the presence of 

 foraminifera and rock particles. 



CaCO^ 4 per cent. (Anal.) : — Foraminifera. 



Siliceous organisms 1 per cent. : — Sponge spicules and radiolaria. 



Minerals 20 per cent., angular and sub-angular, m. di. 0"07 mm. : — The larger 

 pieces (up to about 0'5 mm.) are almost rounded. Quartz, brown mica, hornblende, 

 augite, magnetite, felspar, chlorite, volcanic glass, calcite, garnet. Glauconite grains. 



Fine washings 75 per cent. : — Similar to Nos. 35 and 37 in character. 



Rocks from the traivl .'—Nearly ^ cwt. of boulders, sub-angular and rounded like 

 rolled boulders from a stream. One weighing 14 lbs., half-a-dozen over 5 lbs. ; many 

 about size of an apple, and a large amount of coarse and fine gravel ; nearly all with a 

 dark surface manganese coating either in whole or part. Gneissic and schistose rocks 

 of considerable variety, quartzites (white and red), granulites, a piece of gabbro, a 

 quartz dolerite, several varieties of basalt — one being a typical spilite ; another shows 

 marked albitisation of the felspars ; a third has a fine development of secondary epidote, 

 — red and purple sandstone. 



Chief foraminifera : — Glohigerina hulloides, G. dutertrei, Truncatulina loueller- 

 storfi, T. tenuimargo, T. tenera. Numerous large arenaceous types such as : — 

 Rhahdamnfiina, Psammosphwra, Saccammina, Pelosina, Hyperamm^ina, Reophax, 

 Hormosina, Haplophragmoides, Trochammina, Cyclammina, Textularia. 



39. Station 418; March 19, 1904; lat. 71° 32' S., long. 17° 15' W. ; depth 1221 

 fathoms. 



Glacial Mud or Clay. — Similar in general characters to No. 38, but is less gritty. 

 CaCO^ 2 per cent. (Anal.) : — ^Foraminifera. 



