520 Mr. J. Murray on Oceanic Deposits examined 



closed seas we have visited, as Arafura, Banda, Celebes, and China Seas, 

 Inland Sea of Japan ; and in all these the carbonate-of-lime organisms 

 would appear to be removed from the' bottoms in depths less by some 

 400 or 500 fathoms than on open coasts. 



In the green muds from 50 to 700 fathoms we have found those beau- 

 tiful casts of Eoraininifera, Pteropods, Ec7iini-sj)'mes, and other carbonate- 

 of-lime organisms frequently in great numbers. These are of a dark 

 green, pale green, and dirty white colour. In all cases where these green 

 internal casts occur we have many glauconite grains in the bottom. 

 Beyond 700 fathoms these casts seldom occur, and when they do they 

 are very sparingly distributed ; and the same may be said of the glauco- 

 nite grains which accompany them. Eiver-muds, in which Pteropods, 

 Eadiolaria, and pelagic Eoraininifera are usually wanting, are included in 

 these deposits. 



The following are the localities in which we have found the blue muds 

 (an * before the locality indicates that the glauconite casts and grains 

 have been found there) : — 



* Off coast of Portugal. 



„ Virgin Islands (?). 



* „ Coast of North America, Halifax to New York. 

 ,, Guinea, coast of Africa. 



* „ Cape of G-ood Hope. 

 „ Antarctic ice-barrier. 



* „ Australia. 



* „ New Zealand. 



* „ New G-uinea and Philippines, and throughout the seas of 



the East-Indian archipelago. 



* ,, Japan. 



„ East coast of South America. 



The following are the depths of the soundings which have been placed 

 under this bead : — 



fms. 



fms. 



fms. 



fms. 



fms. 



1125 



1700 



1675 



32 



375 



1290 



1240 



1800 



1100 



2225 



1475 



1350 



1300 



700 



2050 



1380 



1340 



2200 



2800 



2000 



1800 



1250 



400 



1425 



1075 



1000 



2020 



150 



2550 



2250 



525 



1750 



140 



2100 



20 



900 



2500 



75 



700 



2675 



600 



2325 



39 



90 



1875 



3875 



1250 



40 



150 



2225 



2425 











