on board H.M.S. 'Challenger.' 481 



tides, as quartz, mica, &c, and a green and red mineral ; a good 

 many pelagic Foraniinifera and Coccoliths; a few Eadiolaria and 

 Diatoms (Coccinodiscus &c). 



Sounding 81. 2nd May, 1873. 1700 fathoms. Lat. 37° 25' N., long. 

 71° 40' W. A blue mud containing : — Much amorphous clayey 

 matter ; many fine and coarse mineral particles, as quartz, mica, &c. ; 

 a good many pelagic Foraminifera and Coccoliths; a good many 

 Diatom remains and a few Eadiolaria. 



Sounding 82. 3rd May, 1873. 1240 fathoms. Lat. 38° 34' K, long. 

 72° 10' W. A blue mud containing : — Amorphous clayey matter ; 

 many coarse mineral particles as quartz, mica, granitic pebbles, &c. ; 

 a few pelagic and other Eoraminifera, Coccoliths; a good many 

 Diatom remains. 



Sounding 83. 6th May, 1873. 1350 fathoms. Lat. 40° 17' N., long. 

 66° 48' W. A blue mud, same as the last. 



Sounding 84. 7th May, 1873. 1340 fathoms. Lat. 41° 15' N., long. 

 65° 45' "W. A blue mud comprised of : — Amorphous matter ; an 

 immense number of mineral particles and pebbles ; pelagic Foranii- 

 nifera and Coccoliths; a few Diatoms ; a few glauconitic casts of the 

 Foraniinifera were noticed after treatment with acid; a block of 

 cyanite (5 cwt.) came up in the dredge. 



8th and 20th May, 1873. 75 and 83 fathoms. Lat. 43° 2' N., long. 

 64° 2' W., and lat. 43° 3' N., long. 63° 39' W. Le Havebank. The 

 bottom was composed of sand and gravel. Two or three Foraraini- 

 fera and glauconitic casts. 



Sounding 85. 21st May, 1873. 1250 fathoms. Lat. 42° 8' N., long. 

 63° 31' W. A blue mud containing: — Amorphous matter; very 

 many sandy particles (quartz, mica, &c.) ; a good many pelagic and 

 other Foraniinifera ; Coccoliths and Ehabdoliths ; a few Diatoms and 

 Eadiolarian remains. 



Sounding 86. 22nd May, 1873. 2020 fathoms. Lat. 41° 19' N., long. 

 63° 12' W. A blue mud, with red upper layer, containing : — Amor- 

 phous clayey matter ; a great many mineral particles, as mica, quartz, 

 &c. ; many pelagic Foraminifera and Coccoliths ; a few Eadiolaria 

 and Diatoms. 



Sounding 87. 23rd May, 1873. 2800 fathoms. Lat. 39° 44' N., long. 

 63° 22' W. A red or grey clay containing : — Much amorphous 

 clayey matter ; very many fine mineral particles, and a few rather 

 coarse ones of mica, quartz, and a green mineral ; a good many pe- 

 lagic Foraminifera and Coccoliths. 



Sounding 88. 26th May, 1873. 2650 fathoms. Lat. 36° 30' N., long. 

 63° 40' W. A red or grey clay containing: — Much amorphous 

 clayey matter ; very many fine and a few rather coarse mineral par- 



2n2 



