i 92 DISCOVERY REPORTS 



polyzoan fragments, echinoderm spines, shell fragments, and worm tubes made of sand. A large 

 proportion of black grains in the finer grades, and many white foraminiferan shells which give the 

 characteristic speckling to the type. Silt light brownish green. Two samples, WS 804, WS 838. 



Type C7. Light brown sand with an admixture of clear transparent angular grains, and a small 

 proportion of pink grains in the finer grades. The coarser grades, which form about half of the type, 

 consist of irregular and angular light brown stones, large fragments of shell, calcareous worm tubes, 

 with some echinoderm spines and coral fragments. Silt grey with a slight green tint. One sample, 

 WS 221. 



GROUP D. GREYISH-BROWN SANDS 



Type D i. Fine greyish brown sands, of even rather than speckled appearance, though composed 

 of a mixture of brown, black or dark grey, and white grains, with a slight greenish tint owing to the 

 colour of the silt. Small bivalve shells or worm tubes made of fine sand in the medium grades of 

 some samples ; some Foraminifera in the finer grades of others. Silt greyish and brownish green to 

 green. Eight samples, WS 78, WS 79, WS 217, WS 227, WS 764, WS 785, WS 786, WS 793. 



Type D 2. Darker and coarser greyish-brown sands composed of black, dark grey, brown and 

 yellow grains. Large worm tubes made of medium and fine gravel, calcareous worm tubes and coral 

 in the coarse grades of WS 849. The coarser grades dark grey, light grey and brown gravels. Silt 

 yellowish to greyish green. Three samples, WS 80, WS 243, WS 849. 



Type D3. Dark greyish-brown sands with marked speckling. Greyer and less brown than the 

 preceding types of group D. Dark grey, brown, and yellow or white grains are the chief components, 

 with a few Foraminifera in the finer grades. Worm tubes made of sand and gravel, calcareous worm 

 tubes, calcareous polyzoan fragments, gastropod shells and light brown pebbles are present in the 

 coarser grades of WS 811. Silt yellowish brown, through brown to greyish green. Five samples, 

 WS 77, WS 242, WS 811, WS 814, WS 817. 



Type D4. Dark greyish-brown sands of more even colour than type D 3, with a higher proportion 

 of coarser grades consisting of dark grey and brown stones and pebbles, coral and broken bivalve 

 shell. Some angular fragments of brown stone in WS 848, and large worm tubes made of gravel in 

 WS 800 : Foraminifera are conspicuous in the finer grades of WS 91 . Silt yellowish to greyish brown. 

 Four samples, WS 91, WS 92, WS 800, WS 848. 



Type D5. In this type the gravels and large fragments preponderate in quantity over the finer 

 grades. The finer grades are dark greyish-brown sands of rather even tint, the coarser grades con- 

 sisting mainly of dark and light grey, brown, and yellow stones and gravels. Shell fragments, coral, 

 calcareous encrusting Polyzoa and worm tubes, and worm tubes made of gravel, occur in the coarser 

 grades. Silt greenish yellow to greenish brown. Six samples, WS 225, WS 798, WS 803, WS 805, 

 WS 816, WS 850. 



GROUP E. GREY SANDS AND SILTS 



Type E i. Very fine sandy muds of even, light grey colour. No grades above fine sand occur, and 

 silt preponderates except in WS 776 where it forms about half of the sample. WS 777 is a stiff grey 

 clay which dries to solid lumps and not to powder, while the silt of the other examples of the type 

 dries into hard cakes, grey in colour, which bind the fine sand. Three samples, WS 776, WS 777, 

 WS 812. 



Type E2. Fine muddy sands of light speckled grey colour. The sand grains are mostly black or 

 dark grey, and white, with a small admixture of brown grains not sufficient to give their tint to the 

 type. There are a few grey and yellow pebbles in the coarser grades. Silt greyish green to yellowish 

 green. Three samples, WS 90, WS 218, WS 814. 



Type E3. Fine muddy sands of even dark grey colour. Dark and light grey, brown and yellow 

 stones and gravel occur in the coarser grades of some samples ; coral, both Turbinolid and an ar- 

 borescent form, shell fragments, papery worm tubes and echinoderm spines in others. The finer 



