1106 
THE VOYAGE OF H.M.S. CHALLENGER. 
STAT10.N 394 . 
OKr,A5ISM« ntnii 
S; KrAC»-NiT«L 
Density at 60° F. : — 
Surface, 
. 1 02519 
300 fathoms, . 
. 1-02542 
25 fathoms, . 
. 1-02525 
400 „ 
. 1-02538 
60 „ . . 
. 1-02519 
800 „ 
. 1-02544 
100 „ . . 
. 1-02536 
1775 „ 
. 1-02577 
200 „ . . 
. 1-02548 
Depth, 2270 fathoms ; deposit, Eed Clay, containing only a trace of carbonate of 
lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 4.30 A.M. shortened and furled sails. At 5.30 a.m. proceeded under steam and 
sounded in 2270 fathoms. Took serial temperatures from surface to bottom. The 
carbonic acid was determined in water from 25 and 400 fathoms, and amounted respectively 
to 33’1 and 44‘6 milligrammes per litre. At 12.50 p.m. proceeded under steam. The 
weather was calm, and as usual on such occasions very few birds were seen about the ship ; 
occasionally a prion, mutton bird, or Diomedea exulans, would bear in sight, course 
around the ship, and soon disappear. 
Valparaiso distant at noon, 1368 miles; Juan Fernandez, 1028 miles. Made good 
119 miles. Amount of current 10 miles, direction S. 11° W. 
The following species is recorded from this Station : — 
^ 
Deep-Sea Keratosa (Haeckel, Zool. pt. 82). 
llolopsamma argillaceum, n.sp. One specimen ; obtained at no other locality. 
Surface Orga n i sms . — The following species are recorded from the surface at this 
Station : — 
CoPEPODA (Brady, Zool. pt. 23). Pteropoda (Pelseneer, Zool. pt. 65). 
Calanus tonsus, n.sp. Clio (^Styliola) suhula (Quoy and 
Gaimard). 
Cuvierina columnella (Rang). 
In a<ldition, the following arc recorded in the note-books : — Peridinium tripos and 
other species, Glohigenna, Ilastigerina, Pulvinulina micheliniana, Acanthometrse and 
other Ra^liolaria, Sagitta, Copilia, Setella, and other Copepods, larvae of Podophthalmiae, 
A ppendicuhtria, Salpn, and Doliolum. Tow-nets were sent down to 200 fathoms and 
procured, in addition to the organisms noted from the surface, many Medusae, 
Siphonophorai, Ctenojdiorm, Cypridinm, Pteropods, several stages of Doliolum, along 
with several forms of Radiolaria {Challengeria, &c.), many small Amoeboid particles, and 
Infusoria. The specimens of Pulvinulina were very numerous and very fine and large. 
