480 Mr. J. Murray on Oceanic Deposits examined 



pieces of coral; Polyzoa, Serpula, large Foraininifera, Tecetularia, 

 Nodosaria, Crystellarias, &c. ; broken pieces of Eehinoderm shells &c. 



Sounding 71. 21st April, 1873. 1375 fathoms. A coral-mud, same as 

 No. 69. Specimen not preserved. 



Sounding 72. 22nd April, 1873. 2450 fathoms. Lat. 32° 39' N., 

 long. 65° 6' W. A coral-mud containing : — Much amorphous cal- 

 careous and a little clayey matter ; many pelagic Foraniinif era and 

 Coccoliths ; a few siliceous spines ; a few mineral particles, some 

 green, some of an olive-colour (serpentine and olivine ?). 



Sounding 73. 22nd April, 1873. 2100 fathoms. Lat. 32° 26' N., long. 

 65° 9' W. A coral-mud containing : — Many pelagic Foraininifera, 

 Pteropods, other surface shells, Coccoliths, and Ehabdoliths ; broken 

 pieces of Coral, Polyzoa, and shore forms of Foraininifera ; a few 

 siliceous spines and Eadiolaria. 



Sounding 74. 22nd April, 1873. 1950 fathoms. Lat. 32° 15' N., long. 

 65° 8' W. Same as last, with more pelagic shells and larger pieces 

 of broken coral. 



23rd April, 1873. 32 fathoms. About 13 miles S.W. of Bermuda. A 

 hard bottom composed chiefly of large pieces of broken fierpula reefs, 

 on which were Crystellaria and other large Foraminifera, Alcyona- 

 rians, &c. 



Sounding 75. 24th April, 1873. 2650 fathoms. Lat, 32° 19' N., long. 

 65° 39' "W. A coral-mud containing :■ — Many pelagic and other 

 Foraminifera and their broken parts ; many Coccoliths and Ehab- 

 doliths ; amorphous, calcareous, and some clayey matter ; a few 

 mineral particles, white and yellow (mica) ; a few siliceous spines 

 and Eadiolaria. 



Sounding 76. 25th April, 1873. 2600 fathoms. Lat. 33° 3' N., long. 

 66° 32' W. A grey clay containing : — Much amorphous clayey 

 matter ; many fine mineral particles, some of a yellow colour, others 

 white ; a good many pelagic Foraminifera, Coccoliths, and Ehabdo- 

 liths ; a few manganese grains. 



Sounding 77. 27th April, 1873. 2850 fathoms. Lat, 34° 3' N., long. 

 67° 32' W. A red clay containing: — Much amorphous clayey 

 matter ; many very fine and some rather coarse mineral particles — 

 mica, quartz, olivine (?), &c. ; a good many pelagic Foraminifera 

 and some Coccoliths. 



Sounding 78. 28th April, 1873. 2675 fathoms. Lat. 34° 51' N., long. 

 68° 30' "W. A small quantity of mud came up in the dredge which 

 indicated a bottom same as the last. 



Sounding 79. 30th April, 1873. 2425 fathoms. Lat, 35° 58' N., long. 

 70° 39' W. A blue mud with reddish upper layer containing : — 

 Much amorphous clayey matter; many fine and coarse mineral par- 



