PRELIMIXARY REPORT. 81 



coral-sand, or coral-sand ooze, with a gradually increasing percentage of 

 Globigerinte. These are met with in as great a depth as 2613 fathoms, at 

 Station 213 between Jaluit and Ailanglab Lab and all through the Mar- 

 shall group in deep water in the ciiannels between the different groups. 

 See Stations 219, 2179 fathoms; 226, 2231 fathoms; 229, 1583 fathoms; 

 232. 2221 fathoms; 233-234, varying from 1009 fathoms to 2486 fathoms; 

 while in the shallower stations referred to above, such as Stations 216, 1068 

 fathoms; 218, 631 fathoms; 221, 400 f^ithoms; 222, 827 fathoms; 227, 228, 

 230, in 468, 934, and 482 fathoms, — we find that the bottom deposits con- 

 tain coral sand, changing from coarse to fine and then to ooze with the 

 increase in depth. 



Red clay is, however, met with in the bottom deposits of the northern 

 part of the Marshall group between Rongelab and Likieb at Stations 

 223-225, in depths varying from 2469 to 2609 fathoms, though even at 

 that depth it is associated with a considerable percentage of GlobigerinJB. 



Similarly on our way through the Caiolines we found Globigerina3 to 

 constitute a considerable percentage of the bottom deposits to depths of 

 nearly 2500 fathoms. See Stations 240, 241, lat. 6' 49' N., long. 156' 36' E. ; 

 243, 244, lat. 8" 06' N., long. 151' 08' E. The bottom deposits in the 

 Carolines consist, as we would naturally expect from the geological struc- 

 ture of the Carolines, near the island groups, in great part of volcanic 

 nuid mixed with coral sand and Globigerina? ; the size of the sand, vol- 

 canic or coral, gradually decreasing as tlie depth increases. "See Stations 

 239 and 242. 



It is only as we pass into the "Caroline Deep" separating the Carolines 

 from Guam and the Ladrones that we come upon bottom deposits consisting 

 of red clay, manganese nodules, and pumice, as well as volcanic particles. 

 See Stations 245, 2735 fathoms ; 246, lat. 10' 34' N., long. 148" 25' E., 

 2993 fathoms; 247, lat. IF 35' N., long. 147' 15' E., 3213 fathoms; 248, 

 lat. 12' 51' N., long. 145' 46' E., 4813 fathoms; and as we approach Guam 

 at Station 249, in 2337 fathoms, we come upon deposits of fine volcanic sand. 



No soundings were made by the "Albatross" on the line from Guam 

 to Yokohama, as the line is parallel for a considerable length with that 

 run by the " Challenger" from the Admiralty Islands to Japan. In addition 



