CuAP. U.] INFLECTION DIRECTLY CAUSED. 23 



me. In 2 m. 30 s.it had moved through an angle of about 45**. 

 The movement as seen through a lens resembled that of the 

 hand of a large clock. In 5 m, it had moved through 90, 

 and when I looked again after 10 m., the particle had reached 

 the centre of the leaf; so that the whole movement was com- 

 pleted in less than 17 m. 30 s. In the course of some hours 

 this minute bit of meat, from having been brought into con- 

 tact with some of the glands of the central disc, acted 

 centrif ugally on the outer tentacles, which all became closely 

 inflected. Fragments of flies were placed on the glands of 

 four of the outer tentacles, extended 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 frag- 

 ment 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 

 oxterior tentacles on distinct leaves; three of these were car- 

 ried 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 embraced 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 particles 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 many of the other 

 tentacles. We here see clearly that such bodies as particles 

 of cinder or little balls of paper, after being carried by the 

 tentacles to the central glands, act very differently from frag- 

 ments of flies, in causing the movement of the surrounding 

 tentacles. 



