14 BULLETIN OF THE 
In the section from Station 3375 towards Malpelo and to the Pearl 
Islands in the Bay of Panama (Plate VI. Fig. 2), the water becomes 
somewhat colder as we approach Malpelo and as far as Station 3,381 
in 1,772 fathoms, where the temperature gradually rises again (the 
40°, 45°, and 60° curves) towards the Bay of Panama, although the 
surface temperature has been gradually diminishing from 84° off Cocos 
Island to 77° off Malpelo, to become as low as 73° off the mouth of the 
Bay of Panama in 1,168 fathoms, to rise again to 75° in the shallow 
water of the bay itself. 
The three temperature sections of Plate VII. Figs. 1, 2, 3, from Station 
3392 to Caracoles Point, on the east shore of the Bay of Panama, and 
to Point Mala, and from Station 3383, fifty miles to the south of Cara- 
coles Point, to Panama, show an increase of temperature as we rise above 
the continental slope to the heated waters of the bay, and close to Point 
Mala on its western face. 
In the temperature section from Galera Point to Chatham Island 
(Plate VIII.) we find the 60° curve but little below the 50 fathom 
line, showing plainly that it is from the southern current that the cold 
water comes which occupies the upper strata of the Bay of Panama. 
The 45° curve rises above the 300 fathom line close to the mainland, 
to fall nearly 50 fathoms below it on the slope of Chatham Island. The 
40° curve is below the 600 fathom line near the mainland, but rises to 
that line off Galera Point, to fall again nearly to 675 fathoms on the 
Galapagos slope. 
It will be noticed that the upper belt of 50 fathoms varies consider- 
ably in temperature, ranging near Galera Point fully 20° in less than 
50 fathoms, and in comparatively short distances more than 17°, the 
surface temperature varying from 80° to 84° on the way to Chatham, 
and the temperature at the 50 fathom line from 59°.1 to 64°.3. 
The bottom temperature is fully half a degree colder below 1,300 
fathoms than it is in the sections from Mariato Point to Cocos, and 
southerly from that island the colder water of the bottom, 36°, extends 
to the western face of the continental slope off the Bay of Panama 
as far as Point Mala, as is seen in the sections of Plate VII. Figs. 1 
and 2. 
The temperature of the upper strata rises somewhat as we approach 
the Galapagos, the 60° curve being found at a depth of 75 fathoms 
(Plate VIII.) off Chatham Island. 
In the temperature section run in a northwesterly direction from the 
Galapagos to Acapulco (Plate IX.) we obtained the deepest soundings of 
