492 Mr. J. Murray on Oceanic Deposits examined 



toms ; a few white, red, and green mineral particles, some of them 

 rather large. 



26th and 27th December, 1873. 50 to 150 fathoms. Off Prince-Edward 

 Island. The dredges in these depths gave a black or dark-grey 

 sand containing : — Many black or brown mineral particles ; pieces of 

 broken shells ; Polyzoa ; Echinoderms ; some pelagic and other 

 Eoraininifera. 



Sounding 180. 29th December, 1873. 1375 fathoms. Lat. 46° 48' S., 

 long. 45° 31' E. A white Globigerina-ooze, containing : — Many 

 pelagic Eoraminifera and a few Coccoliths ; many Eadiolarian and 

 Diatom remains ; a few mineral particles of a w 7 hite and green 

 colour. 

 The fine parts of the sounding were nearly all Diatom remains. 



Sounding 181. 30th December, 1873. 1600 fathoms. Lat. 46° 16' S., 

 long. 48° 27' E. A grey Globigerina-ooze containing : — Many 

 pelagic Eoraminifera (Coccoliths and Pulvinulinas appeared wholly 

 absent) ; many Diatoms and Radiolaria ; many white, black, and red 

 mineral particles. 

 The finer portions appeared wholly made up of the broken frustules of 



Diatoms. 



Sounding 182. 1st January, 1874. 600 fathoms. Off the Crozet 

 Islands. A grey mud containing: — Many pelagic Eoraminifera; 

 Grlobigerinas (Orbulinas, Pulvinulinas, and Coccoliths appeared to 

 be quite absent) ; very many remains of Diatoms and Kadiolaria ; 

 many black, yellow, and red sandy particles. 

 Beautiful casts of the i?c7um-spmes and Eoraminifera remained after 



treatment with acid. These were of a pale straw-colour (green glauconitic 



particles w T ere not observed in this sounding). 



January 1874. 20 to 100 fathoms. During this month many soundings 

 were taken off the east coast of Kerguelen Land in from 20 to 100 

 fathoms. The tube always brought up grey or blue mud contain- 

 ing : — Very many sandy particles of white, red, and black colour; 

 many Diatoms and spicules of sponges. 

 The soundings furthest from the coast were mostly a network of 



sponge-spicules and frustules of Diatoms. 



2nd Eebruary, 1874. 150 fathoms. Between Kerguelen and Heard 

 Islands. The bag of the trawl came up with many basaltic and 

 other pebbles, to which many Brachiopods were attached and some 

 frustules of Diatoms adhered. 



7th Eebruary, 1874. 75 fathoms. Off Heard Island. The bottom was 

 a grey sandy mud containing many black sandy particles, sponge- 

 spicules, Diatoms, &c, as off Kerguelen. 



