SUMMARY OF RESULTS. 
157 
mium). No gulf- weed was to be seen. At night four specimens of Halobatcs were taken 
in the surface-net alive ; when diving the insect is covered with a film of air like its near 
fresh- water relative Hydrometra, and swims in a very similar manner.” 
March 9, 1873. 
Surface Organisms. — Moseley writes : “ A dolphin ( Coryphsena) 1 about a foot long 
was caught at the bows, this being the first. The boatswain hauled another much larger 
one out of the water, but the hook broke. A line I put out astern pulled the jaws off 
another. Gulf-weed is floating past again in considerable quantities, but still merely in 
small masses. There are numbers of flying-fish about. The surface-net taken in at 
6 a.m. contained Scdpee, Leptocephali, and Phyllosoma in abundance.” 
Station 18 (Sounding 62), Tenerife to Sombrero (see Chart 6 and Diagram 1). 
March 10, 1873 ; lat. 19° 41 
Temperature of air at noon, 
Temperature of water : — 
' N., long. 55 13' W. 
74° 8 ; mean for the day, 74°'0. 
Surface, .... 
74-0 
450 fathoms, 
45-0 
50 fathoms, 
73-5 
500 „ ... 
4.3-2 
100 „ ... 
69-8 
550 „ ... 
41-8 
150 „ ... 
64-5 
600 „ ... 
41-2 
200 „ ... 
60-0 
650 „ . . ‘ . 
40-7 
250 „ 
56-7 
700 „ ... 
40-4 
300 „ ... 
53-5 
800 „ ... 
40-0 
350 „ ... 
400 „ ... 
Density at 60° F. at surface, 
50-5 
47-8 
1-02732 ; 
Bottom, . ... 
bottom, 1'02615. 
36-0 
Depth, 2650 fathoms; deposit, Red Clay, containing 15 '78 percent, of carbonate 
of lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 7.15 a.m. put dredge over. At 9..30 a.m. sounded in 2650 fathoms. Took serial 
temperatures at intervals of 50 fathoms down to 700 fathoms. At 2 p.m. commenced 
heaving in dredge, which came up empty at 4.50 p.m., except that it contained a young 
Pyrosoma and a small fish with very minute eyes, possibly from the bottom. Life-boat 
away collecting gulf-weed and surface animals. 
Distance from Sombrero Island at noon, 472 miles. Made good 84 miles. 
Amount of current 15 miles, direction S. 79° W. 
Surface Organisms. — Moseley writes : “ Plenty of gulf-weed about. Five specimens 
of Antennarius w r cre brought in and two nests. Five or six dolphins [Coryphsena) 
were about the ship, swimming leisurely round and round. When seen under water the 
1 This is the “dying dolphin” of sailors, and the expression “ the dying dolphin’s changing hues” refers to this 
fish and not to the Cetacean. 
(summary of results chall. exp. — 1893.) 
Station 17. 
Station 18. 
Organisms from 
the Surface. 
21 
