1U8«) 
THE VOYAGE OF H.M.S. CHALLENGER. 
.statiox Phronimids, Stoiiuitopod larviu, Enphausia, mauy Pteropods, Salpa, Appendicularia, 
and many small fishes. 
STATtoK 285 station 285 (Sounding 430), Tahiti to Valparaiso (see Chart 38 and Diagram 19). 
October 14, 1875 ; lat. 32° 36' S., long. 137° 43' W. 
Temperature of air at noon, 62° ’8 ; mean for the day, 62° ‘2. 
Temperature of water : — 
Surface, 
65-0 
400 lathoms, 
42-8 
25 fathoms, 
63-8 
500 
41-0 
50 „ . . 
63-4 
600 
39-5 
75 „ . . 
63-0 
700 
38-4 
100 „ 
61-8 
800 
37-7 
125 „ 
60-0 
900 
37-0 
150 „ 
57-5 
1000 
36-6 
175 „ 
550 
1100 
36-3 
200 „ . . 
52-3 
1200 
36-1 
,1 
49-8 
1300 
35-9 
2.50 . 
46-8 
1400 
35-8 
275 „ 
46-2 
1500 
35-7 
300 „ 
45-2 
Bottom, 
35-0 
sity at 60° F.: — 
Surface, . 
. 1-02G21 
300 fathoms, 
. 1-025.50 
25 fathoms, 
. 1-02600 
400 „ 
. 1-02556 
50 „ . . 
. 1-02609 
800 
. 1-02553 
100 „ 
200 „ 
. 1-02600 
. 1-02581 
Bottom, 
. 1-02575 
Depth, 2375 fatlioms ; depo.sit, Red Clay, containing 26 ’25 per cent, of carbonate of 
lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 4.15 A.M. shortened and furled sails, and at 5 a.m. proceeded under steam. At 
5.30 A.M. sounded in 2375 fathoms. At 7 a.m. put trawl over and veered 2900 fathoms. 
Obtained serial temperatures down to 1500 fathoms. The carbonic acid was determined 
in l)ottom wat4*r, and amounted to 45 '6 milligrammes per litre. At 1 p.m. commenced 
heaving in trawl, which c.amc uj> at 3.45 p.m. with several specimens, several quarts of dark 
chocolate-coloured clay, and large numbers of manganese nodules, sharks’ teeth, earbones 
and fragments of other bones of Cetaceans, pumice-stones, and angular and rounded 
|Md)bIe-‘., apjKirently ice-borne. The specimen of the deposit procured in the sounding-tube 
