32 8 DISCOVERY REPORTS 



The numerous detrital grains are mostly below 005 mm. in diameter, but a few reach o-i mm. ; they 

 include small crystals of green hornblende. 



Station WS 52. 10. i. 27. Lat. 54 03' 30" S. Long. 3 8° 35' W. 184 m. (Plate XIX.) 

 Diatomaceous mud. A grey mud with abundant detrital grains mostly below 0-05 mm. in 

 diameter, but some reaching 0-25 mm. The flocculent material encloses frustules of Coscinodisais 

 (large), Fragilaria, Cocconeis and Rhizosolenia, together with sponge spicules and much comminuted 

 material. 



Station WS 63. 20-21. i. 27. Lat. 54 36' S. Long. 39 14' W. 1752 m. (Plate XIX.) 

 Diatomaceous mud. No stones are present in this sample of grey mud, though such material is 

 reported in the Station List. The detrital grains, including green hornblende, attain a diameter of 

 o-i mm. The finer fraction consists largely of diatom frustules; the larger centric tests are broken, 

 but the smaller ones (mostly navicular forms) are whole. Occasional Radiolaria and sponge spicules 

 are noted. 



Station WS 71. 23. ii. 27. Lat. 51 38' S. Long. 57 32' 30" W. 6 miles N 6o° E of Cape Pem- 

 broke Light, East Falkland Island. 80 m. (Plate XVIII.) 



Sand. The label states: "Bottom sample taken from contents of trawl". The mineral grains 

 reach a diameter of 0-5 mm., and there is apparently little material of medium grade, though some 

 very small grains are present. There is a considerable proportion of calcareous matter, such as 

 Foraminifera, echinid spines and small molluscan shells. Many of the shells are undamaged but there 

 is also much broken material, some exceedingly small. The Foraminifera include miliolines (Bilo- 

 culina and Miliolina) and rotalines {Globigerina and Anomalina). 



Station WS 76. n.iii. 27. Lat. 5i°oo'S. Long. 62 02' 30" W. 207 m. (Plate XVIII.) 

 Fine dark sand. A fine-grained sand, the average diameter of the grains being less than o-i mm., 

 though some fragments are larger. The minerals are mainly quartz and hypersthene. There is much 

 flocculent matter which encloses organic remains such as sponge spicules and, more rarely, centric 

 diatoms. 



Station WS 77. 12. hi. 27. Lat. 51° 01' S. Long. 66° 31' 30" W. no m. (Plate XVIII.) 

 Coarse dark sand. The sample consists entirely of mineral grains up to 1 mm. in diameter. There 

 is apparently a fair variety of minerals in rounded and subangular grains ; quartz (as usual) is most 

 abundant, but hypersthene is plentiful as worn crystals up to 0-5 mm. in length. 



Station WS 78. 13. Hi. 27. Lat. 51° 01' S. Long. 68° 04' 30" W. 95 m. (Plate XVIII.) 

 Fine dark sand. Consists of rounded mineral grains up to 0-3 mm. in diameter, but the average is 

 much less; the smaller grains seem to be more angular. Supernatant flocculent material. 



Station WS 79. 13. Hi. 27. Lat. 51° 01' 30" S. Long. 64 59' 30" W. 132 m. (Plate XVIII.) 

 Fine dark sand. The rounded sand grains, which average about 0-2 mm. in diameter, are mostly 



of quartz, but hypersthene is also abundant. There is much flocculent material consisting of tiny 



mineral grains, navicular diatoms and sponge spicules. 



Station WS 80. 14. Hi. 27. Lat. 50 57' S. Long. 63 37' 30" W. 152 m. (Plate XVIII.) 

 Fine dark sand. The deposit consists mainly of rounded mineral grains, about 0-3 mm. in dia- 

 meter, but includes also many small angular grains. There is much muddy material of the usual 

 flocculent character, which includes tiny mineral grains, sponge spicules, diatoms (centric and navi- 

 cular forms) a few small Foraminifera, and probably other organic debris. 



Station WS 83. 24. iii. 27. Lat. 52 30' S. Long. 6o° 08' W (approximately). 14 miles S 64 W 

 of George Island, East Falkland Island. 137 m. (Plate XVIII.) 



Sand. This sample is described in the official Station List as " fine green sand with shells ". The 

 mineral grains attain a diameter of about 0-5 mm., but most of them are much smaller; they are 

 chiefly angular fragments of quartz, but grains of hypersthene are occasionally seen. Some opaque 



