1100 
THE VOYAGE OF H.M.S. CHALLENGER. 
Statiok * 291 . 
A.'cimaui rftuM 
Trawl 
• rn -R 
hfiWAfT .Net** 
Density at 60“ F. 
Surface, . 
. 1-02548 
300 fathoms, . 
. 1-02536 
25 fathoma, . 
. 1-02523 
400 „ 
. 1-02533 
50 „ 
. 1-02523 
800 „ 
. 1-02546 
100 „ 
. 1-02536 
1775 „ 
. 1-02528 
200 „ 
. 1-02516 
Bottom, 
. 1-02550 
Depth, 2250 fathoms ; deposit, Red Clay. 
At 4.20 A.M. shortened and furled sails. At 5 a.m. proceeded under steam, and at 
5.30 A.M. sounded in 2250 fathoms. Inside the sounding-tube were two or three small 
|>ellets of Red Clay. At 7.15 a.m. put trawl over.” Took serial temperatures down to 
1500 fathoms. The carbonic acid was determined in water from 1775 fathoms and 
bottom, and amounted respectively to 42*3 and 46*4 milligrammes per litre. At 
12.10 P.M. commenced heaving in trawl, which came up at 2.20 p.m. containing a few 
specimens, and a small manganese nodule with egg-capsule attached. The leads and 
ironwork of tlie trawl were covered in some places with streaks of the black peroxide of 
manganese, as if they had been hauled over a bottom where manganese was abundant. 
The following birds were noticed : — Diomedea exulans, Diomedea melanophrys, Prion 
turtur, Proccllaria capensis, mutton birds, black night-hawks, a white bird of the size of 
the mutton bird, and a large black bird — probably either Diomedea fuliginosa or 
Proccllaria maxima. 
Valparaiso distant at noon, 2310 miles. Made good 102 miles. Amount of current 
1 1 miles, direction E. 
The following species are recorded from the trawl at this Station : — 
Moxaxoxida (Ridley and Dendy, Zool. pt. 59). 
Ps]>erclla hiscrialis, n.sp. One specimen ; obtained also at Station 281. 
Axoniderma mirabile, n.g., n.sp. Two specimens ; obtained at no other locality. 
Onl)^ species of the genus. 
In n^lditiun to the foregoing, the following are recorded in the Station-book : — 
Tubularian Hydroid with stout arborescent chitinous stem, and with small 
Campanularian (?) upon it, mutilated fragment of a very delicate Polyzoon, single limb 
of a shrimp. 
Surflace Organisms. — The following siiccies of Radiolaria arc recorded from the 
surface at this Station ; — 
