490 Mr. J. Murray on Oceanic Deposits examined 



many pelagic Foraminifera ; Coccoliths and Ehabdoliths ; one or two 

 pieces of Diatoms ; a few manganese grains. 

 The dredge brought up an ear-bone of a Cetacean and a piece of 

 pumice, both coated with the peroxide of manganese. 



Sounding 167. 10th October, 1873. 2050 fathoms. Lat. 35° 25' N"., 

 long. 23° 40' W. A white Globigerina-ooze containing : — Very many 

 pelagic Forarninifera ; Coccoliths and Ehabdoliths ; a little amor- 

 phous calcareous and clayey matter ; a good many Eadiolaria ; a few 

 yellow, red, and white mineral particles. 



Sounding 1G8. 11th October, 1873. 1900 fathoms. Lat. 35° 41' S., 

 long. 20° 55' W. A white Globigerina-ooze containing : — Very many 

 pelagic Foraminif era ; Coccoliths and Ehabdoliths ; a little amorphous 

 calcareous and clayey matter; a few Eadiolarians and siliceous 

 spines ; a few coarse and fine mineral particles. 



Sounding 169. 14th October, 1873. 2025 fathoms. Lat. 36° 12' S., 

 long. 12° 16' W. A grey Globigerina-ooze containing: — Many pelagic 

 Foraminifera ; Coccoliths and Ehabdoliths ; some amorphous clayey 

 and calcareous matter ; many sandy particles, of a red, white, and 

 black colour ; a good many Eadiolaria. 



Off Tristan dAcunha. 15th October, 1873. 360 fathoms. A dark grey 

 mud containing : — Much volcanic sand of a black and red colour 

 (olivine &c.) ; a few pelagic Foraminifera, Pteropods, surface Gas- 

 teropods, &c. 



Sounding 170. 18th October, 1873. 1100 fathoms. Off Tristan 

 dAcunha. A piece of shell came up in the tube. In the dredge 

 were several lumps of pumice. 



Sounding 172. 20th October, 1873. 2100 fathoms. Lat. 36° 43' S., 

 long. 7° 13' W. No bottom came up. 



Sounding 173. 23rd October, 1873. 2550 fathoms. Lat. 35° 59' S., 

 long. 1° 34' E. A red clay containing : — Much amorphous clayey 

 matter ; a few rather coarse and many very fine mineral particles ; 

 a few broken remains of pelagic Foraminifera and a few Coccoliths ; 

 a few Eadiolarians ; a few manganese grains. 



Sounding 174. 25th October, 1873. 2650 fathoms. Lat. 36° 22' S., 

 long. 8° 12' E. A red clay containing : — Much amorphous clayey 

 matter ; very many coarse and fine white mineral particles (quartz 

 and pumice) ; a good many broken remains of pelagic Foraminifera ; 

 a few Eadiolarians ; a small tooth of shark ; a few pellets of black 

 manganese. 



Sounding 175. 27th October, 1873. 2325 fathoms. Lat. 35° 35' S., 

 long. 16° 8' E. A blue mud containing : — Many pelagic Foramini- 

 fera, Coccoliths, and Ehabdoliths; very many mineral particles, 



