SUMMARY OF RESULTS. 
233 
Density at 60 F. at surface, 1'02708 ; bottom, 1 '02700. 
Depth, 2650 fathoms ; deposit, Blue Mud, containing 31 '88 per cent, of carbonate 
of lime (see Murray and Renard, Deep-Sea Deposits Chall. Exp.). 
At 5.45 a.m. stopped to sound and obtain temperatures. At 7 a.m. sounded in 
2650 fathoms. At 9 a.m., after commencing temperature operations, the line, with seven 
thermometers attached, carried away, having fouled the propeller. Continued taking 
serial temperatures down to 1500 fathoms. The carbonic acid was determined in 
bottom water, and amounted to 64 '0 milligrammes per litre; the water was slightly 
turbid with calcium carbonate. The wind fell to a calm, and the ship proceeded under 
steam. 
Distance from Bermuda at noon, 261 miles. Made good 69 miles. Amount of 
current 8 miles, direction N. 61° E. 
Surface Organisms. — The following species is recorded from the surface at this 
Station : — 
Pteropoda (Pelseneer, Zool. pt. 65). 
Clio pyramidata , Linne. 
Willemoes-Suhm writes : “ Among the surface things there was a Pteropod distin- 
guished by two pairs of lateral appendages, one pair bearing thread cells. It was, as the 
ovary showed, a full-grown animal. It has been figured by Eschscholtz; Rang reproduces 
the figure, adding that he does not believe it to be a good species, but that Eschscholtz 
was deceived by some foreign bodies hanging out of the shell of a Cleodora [ = Clio ] 
cuspidata, among the synonyms of which he therefore places it. Our figure shows 
that Cleodora pleur opus, Rang, is a perfectly distinct and : good ’ species. There was also a 
young, very transparent, Sipunculus, which shows that these worms, after having quitted 
the larval stage, continue to swim, at the surface for a certain time, probably by the aid of 
their tentacles. There were, besides, shrimps belonging to Euplmusia and Thysanopoda, 
and many specimens of Lucifer , of which I never could hitherto find the female ; males 
with ripening spermatophores were, however, frequently observed.’’ 
Station 54 (Sounding 113), Halifax to Bermuda (see Chart 9 and Diagram 2). 
May 27, 1873; lat. 34° 51' N., long. 63° 59' W. 
Temperature of air at noon, 72 o, 0; mean for the day, 71 '3. 
Station 53. 
Organisms from 
Sueface-Rets. 
Station 54 
