256 Transactions of the Society. 



tube. Now I expected to see it fall, but this was prevented, for 

 the worm still supported it by the tentacles passed around. The 

 empty lips were meanwhile held up as though asking for some- 

 thing ; a supply of small grains of sand was brought up by the 

 long outer tentacles and emptied into the lips by the smaller ones 

 (a state of affairs which is illustrated by fig. 11) ; then the head or 

 forepart of the worm stretched out of its tube sufficiently to 

 enable the lips to empty their contents, mingled with cement, out- 

 side and just underneath the stone, as illustrated in fig. 12; the 

 tentacles still retained their hold ; the lips were held up and a 

 second time filled with sand ; this second supply of supporting 

 material was, as before, placed underneath, hut on the opposite side 

 of the stone ; then the tentacles relaxed their hold, the stone having 

 been scientifically supported and securely fixed in position, with 

 all the skill of a professional builder. 



The operation on tlie part of the worm was quite deliberate, 

 and my observations were reported to my friend, bit by bit, as the 

 events occurred, and I see no possibility of error. 



The drawings which accompany this Note were made at the 

 time in order to record what appeared to me to be a display of 

 intelligence such as I had not previously seen, and such as I have 

 never seen since. Whether the facts observed should be attributed 

 to instinct, or reason, or can be explained in the more modern way 

 as response to an external stimulus, I will not venture to decide. 



