on hoard H.M.S. 'Challenger. 3 501 



2nd November, 1874. 100 fathoms. A green mud containing : — Amor- 

 phous matter; many pelagic and other Foraminifera ; Pteropods, 

 Heteropods, surface G-asteropods, and larval Lamellibranch shells ; 

 many quartz, mica, and green and black mineral particles ; a few 

 siliceous spines. 

 Very complete casts of the carbonate-of-lime organisms in. pale green 



remained after treatment with acid. 



2nd November, 1874. 705 fathoms. Lat. 12° 24' N., long. 122° 15' E. 

 A green mud containing : — Much amorphous clayey matter ; very 

 many fine mineral particles of quartz, mica, and a green mineral ; a 

 few pelagic Foraminifera and a few broken pieces of Pteropods and 

 other surface shells ; a few Coccoliths. 



China /Sea. 



Sounding 229. 13th November, 1874. 1050 fathoms. Lat. 16° 42' N., 

 long. 119° 22' E. A grey mud containing : — A great deal of amor- 

 phous clayey matter; many fine black, white, and green mineral 

 particles ; a good many pelagic Foraminifera ; a few Coccoliths ; one 

 or two manganese grains. 



China and JSulu Seas. 



Sounding 230. 8th January, 1875. 2100 fathoms. Lat. 17° 54' N., 

 long. 117° 14' E. A blue mud with reddish upper layer, contain- 

 ing : — Much amorphous clayey matter ; many fine white and a few 

 large black mineral particles ; a good many Eadiolarian remains ; 

 one or two broken pieces of Eadiolarians. 



Sounding 231. 16th January, 1875. 700 fathoms. Lat. 12° 21' N., 

 long. 122° 15' E. A blue mud containing : — Amorphous clayey 

 matter ; many fine mineral particles ; a few G-lobigerinas, Pulvinu- 

 linas, and Orbulinas ; Pteropods and Coccoliths ; a few Eadiolarian 

 remains and Diatoms. 



22nd January, 1875. 90 to 150 fathoms. Euplectella-groimd, Zebu. A 

 soft blue mud containing: — Amorphous clayey matter; many fine 

 sandy particles ; a few pelagic and other Foraminifera ; a few shells 

 of larval Gasteropods and Lamellibranchs ; a few siliceous spines. 



25th January, 1875. 375 fathoms. Soundiug 232. Lat. 9° 26' N., long. 

 123° 45' E. A blue mud containing : — Amorphous clayey matter ; 

 very many fine mineral particles ; a few pelagic and other Forami- 

 nifera ; Pteropod and other surface shells ; a few Eadiolarian and 

 Diatom remains. 



26th January, 1875. 185 fathoms. Off Camiguin Island, New Volcano. 

 A green mud containing : — Very many red, white, and black mineral 

 particles ; green amorphous clayey matter ; a few pelagic Foramini- 



