T236 
THE VOYAGE OF H.M.S. CHALLENGER. 
Station 3-11. 
Station 342. 
The tow-nets near the surface yielded a greater abundance of organisms than at 
tlie last few Stations, including; — Pijrocystis, Ethmodiscus, Globigerina, Orbulina, 
Acanthonietnn, l^olycystinae, and compound Radiolaria, Siphonophorae, Sagitta, 
Tonwpterun, Alciopa, Cypridina, Copepods, Amphipods, Euphausia, Sergestes larvae, 
Ideuropus [ = Cavolinia] and other Pteropods and* other small shells, Doliolum, and 
A pixnidicidaria. 
Station 342 (Sounding 492), Tristan da Cunha to Ascension Island (see Chart 16 
and Diagram 7). 
March 26, 1876 ; lat. 9° 43' S., long. 13° 51' W. 
Temperature of air at noon, 79°‘5 ; mean for the day, 78°'9. 
Temperature of water ; — 
Surface, 
80-0 
170 fathoms, 
49-5 
10 fathoms. 
80-2 
180 
49-0 
20 „ 
80-0 
190 
48-4 
30 „ 
78-8 
200 
47-8 
40 „ 
76-0 
225 
46-9 
oO 
7 1 -5 
250 
45-9 
60 „ 
67-2 
275 
45-1 
70 „ 
62-3 
300 
44-5 
^^o „ 
58-3 
400 
42-5 
90 „ 
55-7 
500 
40-8 
100 „ 
54'4 
GOO 
39-7 
110 „ 
53-7 
700 
39-1 
120 „ 
52-9 
800 
38-8 
130 „ 
52-1 
900 
38-4 
HO „ 
51-3 
1000 
38-2 
l.-iO „ 
.50-6 
Bottom, 
37-5 
ICO „ 
50-0 
Density at 60° F. 
— 
.Surface, 
. 1 02721 
300 fathoms. 
. 1-02602 
2.') fathoms, 
. 1 -02708 
400 „ 
. 1-02564 
00 „ 
. 1-02688 
900 
. 1-02589 
100 „ 
. 1 -02.'399 
Bottom, 
. 1-02600 
200 „ 
. 1 -0201 2 
Depth, 1445 fathoms; deposit, Fteropod Ooze. 
t 3 P..M. shortrned 
and furlcfl sails. 
and proceeded 
under steam to 
