156 
THE VOYAGE OF H.M.S. CHALLENGER. 
Sr.imx 16. 
Axnuii) mow 
Diunx.K. 
Station 17. 
Osoaniawi no m 
bcmrAL^Sm. 
At 8 a m. put dredge over and veered 3000 fathoms. At 10 a.m. sounded in 
2 13 j fathoms. At 1.20 p.m. commenced heaving in dredge, which came up at 4.15 p.m. 
r ntaining a considerable quantity of ooze, along w r ith manganese concretions, sharks’ 
teeth (two O.ryrhina and one Lamna) and valves of Scalpellum coated with manganese. 
S mbrero Island distant at noon, 744 miles. Made good 101 miles. Amount of 
current 7 miles, direction S. 72° W. 
Th following species is recorded from the dredge at this Station : — 
Lamellibranchiata (Smith, Zool. pt. 35). 
Area (Barba tia) pteroessa, n.sp. Two specimens; obtained also at Stations 24,71, 
73, 237, and 246, 390 to- 2050 fathoms. Recorded sub- 
sequently from Indian Ocean (“ Investigator”) (?). 
Station 17 (Sounding 61), Tenerife to Sombrero (see Chart 6 and Diagram 1). 
March 8, 1873 ; lat. 20° 7' N., long. 52° 32' W. 
Temperature of air at noon, 75 c, 8 ; mean for the day, 73°*7. 
Temperature of water : — 
Surface, . 
74-0 
900 fathoms, . 
• .. 
39-9 
UK) fathoms, 
69-5 
1000 „ 
. 
39-4 
200 „ 
62-0 
1100 „ 
. 
39 0 
300 „ 
54-5 
1200 , r 
.. *. 
38-5 
400 „ 
48-5 
1300 „ 
• . 
380 
500 „ 
44-7 
1400 „ 
. 
37-5 
600 „ 
425 
1500 
* • 
37-1 
700 „ 
41-2 
Bottom, . 
• 
36-5 
800 „ 
40-4 
Density at 60° F. 
at surface, 1*02766 ; 
1370 fathoms, 1*02607. 
Depth, 2385 fathoms; deposit, Globigerina Ooze, containing 58*40 per cent, of 
carbonate of lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 1.35 p.m. shortened and furled sails, and got up steam to sound. At 2.30 p.m. 
-o-. T'ded in 2385 fathoms. Took a series of temperatures at intervals of 100 fathoms 
down to 1300 fathoms. Naturalists went aw r ay in the whaler to collect surface animals. 
At 5.30 p.m. completed sounding and made sail. 
S' mbrero Island distant at noon, 642 miles. Made good 103 miles. Amount of 
current 2 miles, direction 8. 73’ W. 
Surface Organisms. Moseley writes : “ Murray and I went away in a boat ; the 
urf. < . MC'-t renvu kably destitute of animal life, but full of Oscillatoriaccac ( Trichodes - 
