Station 157. 
Animal* mox 
Toawu 
506 THE VOYAGE OF H.M.S. CHALLENGER. 
Density at GO" F : — 
Suriace, . . .1 02509 | 100 fathoms, . . . 1 -02537 
50 fathoms, . . . 1 02507 j Bottom, .... 1-02561 
Depth, 1960 fathoms ; deposit, Diatom Ooze, containing 1929 per cent, of 
carbonate of lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At G.30 a.m. shortened and furled sails and proceeded under steam to trawl and 
sound. At 8 a.m. put over trawl, and at 9 a.m. sounded in 1950 fathoms. A small 
quantity of Diatom Ooze came up on the sounding tube. Several temperatures 
were taken down to 500 fathoms. Samples of water w'cre taken from depths of 
50 and 100 fathoms. The carbonic acid was determined in the bottom water, and 
amounted to 4 4 '3 milligrammes per litre. The tow-nets, which were dragged at the 
surface of the sea and a few fathoms beneath, came up nearly filled with a slimy 
mass consisting almost entirely of Diatoms ; besides the Diatoms there were many 
p lagic Foraminifera, Radiolarians, a few Copepods, Cypridinidae, Hyperidse, and 
Pteropods. At 2 p.m. commenced heaving in trawl, which came up at 4 p.m. with a 
large quantity of Diatom Ooze, many large and small stones, and numerous animals. 
This was one of the most successful hauls of the expedition. A few of the usual sea- 
birds were observed during the day. 1 The wind fell to a calm during the afternoon. 
There was a brilliant sunset, and at 11.45 p.m. a fine aurora australis, stretching in four 
concentric arcs over the S.E. to W. horizon. 
Distance at noon from Cape Otway, 1721 miles. Made good 137 miles. Amount of 
current for the past three days 55 miles, direction N. 19° E. 
The following species are recorded in the Zoological Reports from the trawl at this 
Station : — 
Monaxonida (Ridley and Dendy, Zool. pt. 59). 
Cladorhiza inonilifur/nis, n.sp. One specimen ; obtained at no other locality. 
Hexactixkllida (Schulze, Zool. pt. 53). 
Hulascus polcjaevii, n.g., n.sp. One specimen ; obtained at no other locality. 
Iialonella pipettu, n.g., n.sp. One specimen; obtained at no other locality. Only 
species of the genus. 
Pknnatulida (Kdlliker, Zool. pt. 2). 
Urnbellula carpenteri, n.sp. Several specimens ; obtained nlso at Station 156. 
1 Th< following -fioci*-* of hirdu wen: noticed while nmongst the Antarctic ice : — OceaniUt occanicus, Thai 
ylnriiifub*. Truth 1 1 , a ( A ”]- ''«) antardUa, Omfraga ijigantca, Vwyxircrmn nivea, Daplum capcnsis, Prion dcso 
Ihvmtdsa (PlucUtrm) fuliginota, Slercorariut antardiexu. 
i’attX 
