PKELUriXARY REl'ORT. 97 



In the western Pacific the Ihie run by the "Challenger" from the 

 Admiralty Islands to Japan, sliows the following:^ 



■ At Station 220, lat. 0' 42' S., long. 147^ E., 1100 fathoms, Glohigerina 

 ooze,^ seven species of Radiolarians were obtained from the bottom deposit. 



Tlie Radiolarians from the deposit at Station 224, lat. 7 45' N., long. 

 144° 20' E., in 1850 fathoms, were represented by nearly thirt}' species, and 

 by about sixty species of Foraminifera, 88 per cent of the carbonate of 

 lime of the deposit being represented by pelagic species. 



At Station 225, lat. ir 21' N., long. 143' 76' E., in 4475 fathoms, Radio- 

 larian ooze ; over 350 species of Radiolarians are noted from the deposit, 

 and ten from the surface. The deposit indicates only a trace of carbonate 

 of lime, while at Station 226, lat. 14' 44' N., long. 142' 13' E., in 2300 

 fathoms, the red clay contains 6.11 per cent of carbonate of lime, and in 

 2475 fothoms. Station 227, lat. 17' 29' N., long. 141° 21' E., only a trace 

 of carbonate of lime occurs, as well as at Stations 228, 229, 230, 231. 

 At Station 229, lat. 22' 01' N., long. 140' 27' E., in 2500 fathoms, red 

 clay, the deposit was characteiized by numerous Diatoms. At Station 231, 

 lat. 31' 08' N., long. 137' 08' E., in 2250 fathoms, blue mud, the number 

 of species of Radiolarians in the deposit was greatly reduced, not more 

 than ten being noted at that station. 



It is interesting to note in the line Admiralty Islands to Yokohama that 

 the Globigerina ooze is found in what we may call, in a general way, the 

 equatorial current, between Stations 220 to 224, while the Radiolarians 

 extend as far north as Station 231, taking their greatest development, 

 apparently, in the belt of the trades, from Station 225 to Station 230. On 

 the line from Yokohama to the Hawaiian Islands Idue mud was brouglit 

 lip at the first station east of Japan, No. 237, in 1875 fathoms, with 4.45 

 per cent of carbonate of lime, made up of about 100 species of Foramini- 

 fera, 33 per cent of the carbonate of liiue in the deposits being made up 

 of pelagic species. The deposit at this station is also characterized by the 

 large number of species of Diatoms it contains. Globigerina ooze was 

 brought up only at Station 246, in 2050 fathoms. At all the other stations 



1 John Murray, Observations at each of the " Challenger " Stations. 



2 See Murray and Uenard, Voyage of the " Challi-nger," Deep-Sea Deposits. 



7 



