CHAP. LL INFLECTION INDIRECTLY CAUSED. 25 



than 17 m. 30 s. In the course of some hours this 

 minute bit of meat, from having been brought into 

 contact with some of the glands of the central disc, 

 acted centrifugally on the outer tentacles, which all be- 

 came closely inflected. Fragments of flies were placed 

 on the glands of four of the outer tentacles, ex- 

 tended in the same plane with that of the blade, and 

 three of these fragments were carried in 35 m. through 

 an angle of 180 to the centre. The fragment on 

 the fourth tentacle was very minute, and it was 

 not carried to the centre until 3 hrs. had elapsed. In 

 three other cases minute flies or portions of larger 

 ones were carried to the centre in 1 hr. 30 s. In 

 these seven cases, the fragments or small flies, which 

 had been carried by a single tentacle to the central 

 glands, were well embraced by the other tentacles, 

 after an interval of from 4 to 10 hrs. 



I also placed in the manner just described six small 

 balls of writing-paper (rolled up by the aid of pincers., 

 so that they were not touched by my fingers) on the 

 glands of six exterior tentacles on distinct leaves; 

 three of these were carried to the centre in about 1 hr., 

 and the other three in rather more than 4 hrs. ; but 

 after 24 hrs. only two of the six balls were well em- 

 braced by the other tentacles. It is possible that 

 the secretion may have dissolved a trace of glue or 

 animalised matter from the balls of paper. Four par- 

 ticles of coal-cinder were then placed on the glands 

 of four exterior tentacles ; one of these reached 

 the centre in 3 hrs. 40 m. ; the second, in 9 hrs. ; the 

 third within 24 hrs., but had moved only part of the 

 way in 9 hrs. ; whilst the fourth moved only a very 

 short distance in 24 hrs., and never moved any farther. 

 Of the above three bits of cinder which were ultimately 

 carried to the centre, one alone was well embraced by 



