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



Mud. — A dark brownish-green earthy mud with some white specks ; soft and only 

 slightly coherent when wet. Lighter in colour when dry with numerous small 

 glistening specks of mineral particles and a few small pieces of shells. Slightly gritty. 

 Strong smell of HgS. 



CaCO^ 27 per cent. (Anal.) :— Ostracods, echinoid spines and plates, gastropods, 

 lamellibranchs, foraminifera. 



Siliceous organisms 5 per cent. : — Sponge spicules, a few diatoms, and plant 

 needles. 



Minerals 30 per cent., m. di. 0*08 mm., rounded and angular : — Quartz mainly, a 

 little biotite and hornblende. 



Fine ivashings 38 per cent. : — Brown in colour, amorphous clayey material, minute 

 mineral particles, and fragments of siliceous organisms, especially plant needles '01 to 

 "2 mm. in length. 



Foraminifera : — Chief forms : 



Calcareous. Arenaceous. 



Bulimina elegantissima. Proteonina diffiugiformis. 



Folystomella striatopunctata. Trochammina nitida. 



Polystomella macella. Trochammina nana. 



3. Station 140 ; January 31, 1903 ; lat. 58° 22' S., long. 45° 00' W. ; depth 1698 

 fathoms. 



Diatom Ooze.— Only a very small quantity obtained adherent to the tallow on the 

 bottom of the sounding-lead. Probably partly washed, and not representing the true 

 condition of the bottom. Of a greyish-black colour, very gritty to the touch. 



CaCO^ .-—Nil. 



Siliceous organisms 40 per cent. : — Chiefly broken fragments of diatoms : 

 Rhizosolenia, Fragilaria, Coscinodiscus, etc. 



Minerals 45 per cent., m. di. 0'13 mm. Some as large as 075 mm., rounded and 

 angular : — Quartz, felspar, both monoclinic and triclinic, volcanic glass, palagonite, 

 dark basaltic scorise, hornblende, hypersthene, pale green augite. 



Fine washings 15 per cent. : — Some amorphous material and minute mineral 

 fragments, largely fragments of diatoms. 



4. Station 146; February 1, 1903; lat. 59° 32' S., long. 43° 10' W. ; depth 

 2307 fathoms. 



Diatom Ooze. — Deposit adherent to the lower 15 inches of the sounding-lead, 

 and to the tallow on the bottom of it. As in the case of No. 3, the material cannot 

 be taken as truly representative of the ooze in situ, as it has almost certainly been 

 washed to some extent in bringing up. Grey in colour while wet ; dirty white when 

 dry. Gritty. Slightly coherent. 



