on board H.M.S. 'Challenger' 487 



clayey matter ; a good many fine mineral particles ; a good many 

 pelagic Foraminifera and Coccoliths ; a few Eadiolaria. 



Sounding 136. 19th August, 1873. 2500 fathoms. Lat. 5° 48' N., 

 long. 14° 20' W. A dark blue mud containing : — Much amorphous 

 clayey matter ; many fine mineral particles j a few pelagic Forami- 

 nifera and their broken parts. 



Sounding 137. 21st August, 1873. 2450 fathoms. Lat. 3° 8' N., 

 long. 14° 49' "W. A grey Globigerina-ooze containing : — Very many 

 pelagic Foraminifera and Coccoliths ; much amorphous clayey matter 

 and fine mineral particles ; a good many Eadiolaria. 



Sounding 138. 22nd August, 1873. 2475 fathoms. Lat. 2° 49' N., 

 long. 17° 13' W. Some patches of a grey ooze came up on the out- 

 side of the tube. 



Sounding 139. 23rd August, 1873. 2500 fathoms. Lat. 2° 25' N., 

 long. 20° 1' W. A grey Globigerina-ooze containing : — Many pelagic 

 Foraminifera and a few Coccoliths ; much amorphous clayey matter, 

 and many fine white and red mineral particles ; a few manganese 

 grains. 



Sounding 140. 24th August, 1873. 2275 fathoms. Lat. 2° 6' 1ST., long. 

 22° 53' W. Some traces of a grey ooze came up on the outside of 

 the sounding-tube. 



Sounding 141. 25th August, 1873. 1850 fathoms. Lat. 1° 47' K, 

 long. 24° 26' W. A grey Globigerina-ooze containing : — Many 

 pelagic Foraminifera ; many Coccoliths and Ehabcloliths ; a little 

 amorphous clayey and calcareous matter ; a few white and red 

 mineral particles ; small manganese grains attached to many of the 

 Foraminifera. 



Sounding 142. 26th August, 1873. 1500 fathoms. Lat. 1° 22' N., 

 long. 26° 36' W. A grey Globigerina-ooze containing : — Many 

 pelagic Foraminifera, Coccoliths, and Ehabdoliths ; a few broken 

 pieces of Pteropod shells ; a little amorphous clayey matter and 

 some fine mineral particles ; one small piece of pumicestone. 



Sounding 143. 27th August, 1873. 1900 fathoms. Lat. 1° 10' N., 

 long. 28° 23'. A grey Globigerina-ooze containing: — Many pelagic 

 Foraminifera ; Coccoliths ; a good many Eadiolarians ; a little amor- 

 phous clayey matter, and a few white mineral particles. 



Sounding 144. 29th August, 1873. 1425 fathoms. Off St. Paul's 

 Eocks. A grey Globigerina-ooze containing : — Many pelagic Fora- 

 minifera : — a few Pteropod shells ; Coccoliths ; a good many mineral 

 particles, mica, serpentine, &c. ; one or two Eadiolarians. 



Off St. Paul's Eocks. 29th August, 1873. 780 fathoms. A grey Glo- 

 bigerina-ooze containing : — Many pelagic Foraminifera and Cocco- 



