ANIMALCULES IN SEA-WATER. 353 
three glimpses of the sun, which gave the lati¬ 
tude 68° 26', and the longitude 11° 55' W. 
The brown-coloured sea-water, taken up oh 
Sunday, was now submitted to examination un¬ 
der the microscope. The colouring substance had 
subsided, and combined into filaments and fasci¬ 
culi of particles. These were evidently the re¬ 
mains of animalcules; but their exact form and 
magnitude could not be determined, on account 
of their close and intimate combination. From 
their general appearance, however, I make no 
doubt, but they are of a kind similar to that which 
gives the yellowish-green colour to the sea, ob¬ 
served on this and on a former occasion. 
As the examination of the yellowish-green sea,' 
discovered in the summer of 1820, in latitude 
70° 34', was conducted with great care, I shall 
give an account of those observations, which may 
serve to explain the cause of this and similar ap¬ 
pearances in the w'aters of the ocean, better than 
the details of the imperfect examination now ac¬ 
complished. 
In the case to which I now refer, (namely, the 
observations made in the year 1S20), the surface 
of the sea to an extent of several leagues, was va¬ 
riegated by large patches, and extensive streaks of 
a yellowish-green colour ; having the appearance' 
of an admixture with flowers of sulphur or mus- 
