988 
THE VOYAGE OF H.M.S. CHALLENGER. 
Station 257. At 11 A.M. got up steam. At 11.30 A.M. shortened and furled sails. At noon 
proceeded under steam. At 1 p.m. sounded in 2875 fathoms. The valves of the 
sounding-tube had become jammed, and consequently did not open on reaching the 
bottom, but the tube had sunk two feet into the deposit and was streaked with clay, 
and sufficient was scraped off to indicate the nature of the deposit. Obtained serial 
temperatures down to 1500 fathoms. At 4 p.m. completed temperatures, and at 
4.15 P.M. made all plain sail. Albatrosses became less numerous; one was caught. 
Several boatswain birds were seen flying high. 
Elast point of Oahu Island, Sandwich Islands, distant at noon, 402 miles. Made 
good 89 miles. Amount of current 15 miles, direction S. 45° W. 
Okganisms fkom 
Surfacb-Nbts. 
Surface Organisms. — The following species are recorded from the surface at this 
Station ; — 
Radiolapja (Haeckel, Zool. pt. 40). 
Coscinaspis stigmopora, Haeckel. 
Icosaspis cruciata, Haeckel. 
Sethoconus trochus, Haeckel. 
Theocampe crypt oprora, Haeckel. 
CoPEPODA (Brady, Zool. pt. 23). 
Hemicalanus aculeatus, n.sp. 
Macrura (Spence Bate, Zool. pt. 52). 
Sergestes oculatus, Krpyer. 
Fishes (Gunther, Zool. pt. 78). 
Thyrsites prometheus, C.V. 
Most of the organisms noted at the previous Station wxre taken at the surface ; 
Ilastigeriiia was not, however, noticed. A haul of the tow-net from 500 fathoms 
brought up Glohigerina, Orhulina, Pulvinulina, Phseodaria and other Radiolaria not 
usually observed at the surface, many specimens of Cypindina, Euphausia, and Sergestes, 
as well as masses of Diatoms apparently different from those previously seen on the high 
seas, Pyrocystis, Pendinium, and small Infusoria. Many of the specimens of Pyrocystis 
were in a state of division, an outer sphere frequently containing two perfectly-separated 
individuals. 
.-lATios 25 S. Station 258 (Sounding 400), Yokohama to Sandwich Islands (see Chart 36 and 
Diagnim 19). 
July 24, 1875 ; hit. 26° 11' N., long. 155° 12' W. 
Temperature of air at noon, 77°'5 ; mean for the day, 75°*3. 
