on board H.M.S. 'Challenger. 3 . 503 



Humboldt Bay, New Guinea. 24th February, 1875. 37 fathoms. A 

 green mud containing : — Many mineral particles and amorphous 

 matter ; many shore forms of Eoraminifera ; a few Grlobigerinas, 

 Pteropods, and other surface shells ; a few green internal casts of 

 Foraminifera. 



Sounding 240. 1st March, 1875. 1075 fathoms. Lat. 2° 33' S., long. 

 144° 4' E. A blue mud with a red upper layer, containing : — Much 

 amorphous clayey matter ; fine black, white, and green mineral 

 particles (pumice) ; a great many pelagic Foraminifera and Cocco- 

 liths ; a great many Eadiolaria. 

 In the trawl there were several large pieces of pumicestone, pieces of 



wood and fruits, and a few large Pteropod and Ianthina-shells. 



Nares Harbour, Admiralty Islands. 7th March, 1875. 25 to 16 

 fathoms. Dredgings inside the harbour gave coral-muds and black 

 sandy muds, or a mixture of these. In some places live coral. 



Admiralty Islands to Japan. 



10th March, 1875. Outside Nares Harbour, 152 fathoms. Some traces 

 came up on the tube which indicated a green mud, containing : — 

 Many mineral particles ; debris of coral, Foraminifera, &c. 



Sounding 241. 11th March, 1875. 1100 fathoms. Lat. 0° 43' S., long. 

 147° 0' E. A Globigerina-oozQ containing : — Many pelagic Forami- 

 nifera, Coccoliths, and Ehabdoliths ; a good many Eadiolarian re- 

 mains ; amorphous clayey and calcareous matter ; some fine white 

 and black mineral particles (pumice). 

 Several pumices tones came up in the dredge. 



Sounding 242. 13th March, 1875. 2650 fathoms. Lat. 0° 40' N., long. 

 148° 41' E. A red clay containing : — Much amorphous clayey mat- 

 ter ; many very fine mineral particles ; one small piece of pumice ; 

 a good many Eadiolarians ; a good many manganese grains. 



Sounding 243. 16th March, 1875. 2450 fathoms. Lat. 2° 15' K, long. 

 146° 16' E. A red clay containing: — Much amorphous clayey mat- 

 ter ; very fine mineral particles : a great many Eadiolaria ; a few 

 broken pieces of pelagic Foraminif era ; some manganese grains. 



Sounding 244. 19th March, 1875. 2325 fathoms. Lat, 5° 31' N., 

 long. 145° 13' E. A grey clay containing : — Much amorphous clajej 

 and some calcareous matter ; fine mineral particles (a red and yel- 

 low cherty-like mineral) ; a good many pelagic Foraminifera ; a 

 great many Eadiolaria. 

 Several small pieces of pumice came up in the trawl. 



Sounding 245. 21st March, 1875. 1850 fathoms. Lat. 7° 45' 1N T ., 

 long. 144° 20' E. A Globigerina-ooze with red tinge, containing : — 

 Very many pelagic Foraminifera and Coccoliths ; many Eadiolaria ; 



