984 
THE VOYAGE OF H.M.S. CHALLENGER. 
Station 25H. ^Ir. Murray was away in a boat, and as it was quite calm he observed a number of 
things on the surface. There were large masses of Diatoms united into balls or elongated 
masses, the latter sometimes over six inches in length and two inches in diameter ; they 
were made up of two kinds of Diatoms, or two different stages of development. 
Hastigerina was the most abundant thing on the surface, the specimens looking like 
little red dots all over the surface, and in the tow-net presenting a red mass. One 
specimen was taken in a small bottle, and on being placed under the microscope presented 
a wonderful appearance. The spines were exceedingly long, tapering to a point, and 
very flexible at the extremities. Between the spines were many small spheres, the 
pseudopodia running along the spines and occasionally leaving them. The spheres 
retired on treatment with colouring solution or acid. The specimen with fully-extended 
spheres floated, while those from the tow-net lay in a mass at the bottom of the globe ; 
all attempts to mount specimens with the spheres extended failed. There were many 
compound Radiolaria, Velelhe with lantliinse attached, many specimens of Halohates, 
and in addition all the things mentioned at the previous Station, except that Lepas was 
not noticed, nor any of its larval stages, which again indicated that the ship had passed 
into a region of the ocean where the fauna was different. Several small pieces of pumice 
were picked up, some of them covered with a brown-coloured Alga, or mould. 
Station 256. Station 256 (Sounding 398), Yokohama to Sandwich Islands (see Chart 36 and 
Diagram 19). 
July 21, 1875 ; lat. 30° 22' N., long. 154° 56' W. 
Temperature of air at noon, 7 6° '8 ; mean for the day, 7 4° *5. 
Temperature of water : — 
Surface, . 
25 fathoms, 
50 
75 
100 
125 
1.50 
175 
200 
225 
250 
275 
300 
740 
400 fathoms, 
700 
600 „ 
650 
600 „ 
600 
700 „ 
55-6 
800 „ 
53-2 
900 ,. 
51-2 
1000 
49-5 
1100 „ 
480 
1200 
46-5 
1300 „ 
45-2 
1400 
43-8 
1500 „ 
42-8 
Bottom, 
39°7 
38-2 
37-3 
36-7 
36-3 
36-1 
35-9 
35-8 
35-7 
35-5 
.35-4 
35- 3 
36- 2 
