Station 11. 
Organisms fbom 
TH* SirarACK. 
Station 12. 
Organism* toon 
KctruY-N'm. 
150 THE VOYAGE OF H.M.S. CHALLENGER. 
distance from Sombrero Island at noon, 1307 miles. Made good 109 miles. 
Amount of current 12 miles, direction W. 
Surface Organisms. — A few surface animals were taken in the tow-net from a boat, 
including a beautiful j T oung specimen of Rhizophysa. 
Moseley writes : “ We seem to have got into a region where forms allied to Cory cams 
abound ; I saw three species this morning. A large animal, which I believe to have been 
a grampus ( Greet gladiator), but which some of the sailors thought to have been a shark, 
was ubou; the ship for some time. It appeared to be 20 or 25 feet long, and showed the 
white on its belly and under side of the fins well ; I also saw the dorsal fin out of the 
water once.” 
Station 12 (Sounding 56), Tenerife to Sombrero (see Chart 6 and Diagram 1). 
March 3, 1873 ; lat, 21° 57' N., long. 43° 29' W. 
Temperature of air at noon, 73° ‘8 ; mean for the day, 71°' 9. 
Temperature of water at surface, 73 c, 0 ; bottom, 36 c ‘9. 
Density at 60° F. : — 
Surface, . . . L02761 980 fathoms, . . 1 02611 
400 fathoms, . . 1 -02634 Bottom, . . . 1 02641 
Depth, 2025 fathoms; deposit, Olobigerina Ooze, containing 44'88 per cent, of car- 
bonate of lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
A 6.45 a.m. shortened and furled sails, and proceeded under steam to sound and 
In At 8 a.m. sounded in 2025 fathoms, and at 8.45 a.m. putover dredge and current- 
drag. At 9 a.m. boat put off to test current, and returned at 11 a.m. At 10 a.m. 
naturalists went out in boat to collect surface animals. At 2 p.m. Siemens’ resistance coil 
'.a- low. red and temperatures obtained at different depths. At 4 p.m. the dredge came 
up empty, having fouled the lower part of the dredge-rope. 
l’o it ion at noon, 1140 miles from Sombrero Island. Made good 84 miles. Amount 
of current 16 miles, direction S. 74° W. 
Surface Organisms. — Moseley writes : “The tow-net, put out at night (March 2-3) 
!>r -./'t up .specimens of Phyllosoma, Lvcifer, Cory cams, and Calanella [ = Eucalanus). 
W t li a boat were obtained two specimens of Glaucus and several fine specimens of Porpila, 
on w inch Glaucus in -aid to feed. Glaucus is very active in its movements and reminds one 
r ither of a turtle in the way in which it floats with its head up. When turned on its back 
it r ' covers its position at once by a vigorous motion of its large swimming appendages. 
> slidb of Spiruln picked up on the surface were infested with Cirripcds, Acineta, and 
