OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 667 



Siliceous organisms 2 per cent. : — Sponge spicules, radiolaria, diatoms (especially 

 Coscinodiscus). 



Minerals 15 per cent., angular and sub-angular, m. di. 0*08 mm. : — A few larger 

 grains up to 3 mm. almost rounded in outline. Quartz, felspar (monoclinic and 

 triclinic), brown mica, magnetite, green hornblende, augite, olivine, serpentine, 

 volcanic glass. 



Fine washings 8 1 per cent. : — Fine mineral particles chiefly ; if anything rather 

 more amorphous clay than in No. 38. 



Chief fora'ininifera : — Clavulina communis, Glohigerina dutertrei, Cristellaria 

 convergens, Bathysiphon Jiliformis, Psam,mosphwra fusca, Reopliax nodulosa, 

 Haplophragmoides rotulatum, Cribrostomoides bradyi. 



40. Station 420; March 21, 1904; lat. 69° 33' S., long. 15° 19' W. ; depth 2620 

 fathoms. 



Glacial Mud or Clay. — A brownish-grey mud ; clayey, but not very tenacious, 

 and breaks down fairly easily. Fairly gritty. 



CaCOg.-— Nil. 



Siliceous organisms, trace : — Sponge spicules. 



Minerals 20 per cent., m. di. 0'07 mm., angular chiefly, a few larger pieces sub- 

 angular, one quartz grain 3 mm. long, smooth and rounded : — Quartz, brown mica, 

 augite, magnetite, felspar, olivine, hornblende, (?) glaucophane, pumice. 



Fine washings 80 per cent. : — Moderate amount of amorphous clayey matter, 

 largely minute mineral particles under O'Ol mm. in diameter, i.e. of same type as No. 32. 



Rocks from trawl : — Lost, Not identified. 



Foraminifera : — Washings from trawl yielded a rich harvest of foraminifera, 

 especially of arenaceous forms and also a few calcareous forms. 



Representatives of most of the genera of the Astrorhizidse are to be found, includ- 

 ing no less than eight new species described by Mr Pbarcey — viz., Syringammina 

 minuta, Technitella asciformis, Thurammina reticulata, Hormosina irregularis, 

 Cyclam,mina contortum, Reophax robustum, Haplophragmoides umbilicatum, and 

 Pelosina arborescens. 



There are also representatives of such rare forms as Sorosphsera confusa, 

 Crithionina pisum, and Keramosphsera fusca. Dwarfed forms of Globigerina 

 dutertrei and G. pachyderma are present in small numbers, along with Pullenia 

 sphaeroides, Anomalina polymorpha, and two species of Truncatulina. 



41. Station 421 ; March 22, 1904 ; lat. 68° 32' S., long. 10° 52' W. ; depth 2487 

 fathoms. 



Glacial Clay. — A light brownish-grey clay in colour, light grey when dry. 

 More clayey than No. 40, and needs considerable rubbing down. Also a considerable 

 number of gritty particles. 



