lO-JO 
THE VOYAGE OF H.M.S. CHALLENGER. 
OaoA^niMs FBOM 
TUB I>cri*n. 
Density at 60“ F.: — 
Surface, . 
2.*^ fathoms. 
50 .. 
100 
. 1 02591 
. 1-02577 
. 1 -0258:1 
. 1-025G5 
200 fathoms, 
400 „ 
800 
Bottom, 
. 1-02560 
. 1-02568 
. 1-02593 
. 1-02571 
Depth, 2550 fathoms; deposit, Radiolarian Ooze, containing 20 per cent, of 
carbonate of lime (sec JMurray and Renard, Deep-Sea Deposits Ghall. Exp.). 
.\t 5.30 A.M. stopped to sound and dredge. At 6 a.m. sounded in 2550 fathoms. 
The high percentage of carbonate of lime at this depth is remarkable, and has only 
l»eon met with in tropical waters ; it is apparently connected with the large number 
of cjilcarcou.s organisms in the counter eq^uatorial current. At 7 a.m. put over dredge 
with tow-net attached and tow-net at the weights, and veered 3000 fathoms. Obtained 
serial temperatures down to 1500 fathoms. The carbonic acid was determined in bottom 
water, ami amounted to 32‘8 milligrammes per litre. At 4 p.m. commenced heaving in 
tlrtnlge. .Vt 7 p.m. dredge came up foul, but the tow-nets contained a little mud and a 
small fish ami some red Crustaceans. Made sail. Boatswain birds, fulmars, gannets, 
shearwaters, and land birds, like dotterels, were seen. 
Distance at noon from Venus Point, Tahiti, 1410 miles. Made good 85 miles. 
Amount of current 24 miles, direction S. 75 E. 
The following species of Foraminifera, Radiolaria, and Diatoms were observed in the 
deposit from this Station (sec also l\Iurray and Renard, Deep-Sea Deposits Chall. Exp.) . 
Foraminifkka (Brady, Zool. pt. 22).— The pelagic species, which make up about 
85 |K?r cent, of the carbonate of lime present in the deposit, are marked thus x . 
Ihlnrulina d’Orbigny. 
HafJ»iJtramnium lalvlorMtum (Bomemann). 
Thmmtnmina jtajnUal(L, I'nuly. 
(iam»iryiTut d'Orbigny. 
I'try^Mna Eggcr. 
/ ViMNy«i/f«ka mJ-jIttbimL, Bratiy. 
„ glaUma (Montagu). 
„ yrarili*, Williamaon. 
., Imiyata (K'-um). 
„ Iniffuniftim (WillUmiion), vnr. tmuiJifriafa, 
Brady. 
Siri/mtna •]>. (f). 
» ^ Brady. 
t itfftijtmii tininrm, d’Orbigny 
X PuUenia ohliquilorulata, Parker and Jones. 
„ (juirujueloha, Reuss. 
„ iqihwoul/iit (d’Orbigny). 
HpUarovUna IndloideK, d’Orbigny (?). 
X „ rfeZ/rVcTM, Parker and Jones. 
Trunratulina lohatula (Walker and Jacob). 
» llantken. 
„ imera, Brady. 
„ icmllerxtorji (Sebwager). 
Pulmnulina vxi<jwa^ Brady. 
„ /amix, Brady. 
X „ ?mnardii (d’Orbigny). 
X „ tumifla, P>rndy. 
Ridalia goldanii, d’Orbigny. 
Nimirmina jxtmjdlujideM (Fichtel and Moll) 
„ uvd/iliraiula (Montagu). 
