VOYAGE FROM INDIA TO SIAM AXD MALACCA. 183 



4-5. — During- the night we had approached the two islands 

 of Pullu Wai lying' close to each other as near as a quarter 

 of a mile. The sea was filled with the blue snails. They 

 keep above the water by means of a cellulous long- flat air 

 bladder, which is many times larger than their thin shell, at the 

 same time they stretch out their two feelers, with which they 

 probably seize their food. There is a large slimy bladder inside 

 the animal, containing a beautiful purple-blue, thick fluid. The 

 first-mentioned white bladder and the Medusa porphita, with 

 their white plate-shaped body, gave the appearance to the sea of 

 being speckled with white. I did not see the swimming Tritons, 

 which I had seen here so often last October, and also the different 

 kinds of Cliones were not so frequent, although I caught some of 

 them, especially the Concatenata, which I dried. I also saw the 

 the mollusc of sapphire g^olden colour, but some feet below the 

 surface of the water, so that I could not reach it. 



In the afternoon we had so much wind, that we could leave 

 the neighbourhood of these islands, which with their magnificent- 

 ly green trees had been very pleasant to the eye. In the south- 

 east at some distance from these islands some rugged rocks 

 could be seen, 



X Pe'ican aqui'a (frigate bird) was caught yesterday: I 

 stuffed if to-day. Mr. Itatius Mil Her is wrong in the description 

 of the beak, which Mr. Osbeck describes better. JMine had a 

 brown head ; neck, back, wings, tail, stomach, and half of the chest 

 were also brown ; the lower part of the wings was silvery white. 

 The iris of the eye was straw-coloured,, but I saw one to-day 

 which was also brown underneath, and had only a lighter line 

 across the chest. 



In these days the water of the sea was turbid and some 

 white woolly substance was floating in the water. 



n. — To-day we saw Pullu Pensang before us ; we were still 

 at a great distance from it. 



7. — Already yesterday we saw Pullu Pensang ; to-day we had 

 approached it within two miles distance, at the north-western side. 

 From here we took our course to East-South-East, and in the after- 

 noon we thought we were near Pullu Ubi because we saw a great 

 number of birds hover over one place. The sea was very wild : 

 the waves were rolling m a south-eastern direction. Our captain, 

 who had often made this journey, told us that there was a strong 



