_Stephanotis floribunda_ (Asclepiadaceæ) moves against the sun and made a circle in 6 hrs. 40 m., a second circle in about 9 hrs. _Hoya carnosa_ (Asclepiadaceæ) made several circles in from 16 hrs. to 22 hrs. or 24 hrs. _Ipomæa purpurea_ (Convolvulaceæ) moves against the sun. Plant placed in room with lateral light. 1st circle was made in 2 hrs. 42 Semicircle, from the light in 1 m. hr. 14 m., to the light 1 hr. 28 m.: difference 14 m. 2nd circle was made in 2 hrs. 47 Semicircle, from the light in 1 m. hr. 17 m., to the light 1 hr. 30 m.: difference 13 m. _Ipomæa jucunda_ (Convolvulaceæ) moves against the sun, placed in my study, with windows facing the north-east. Weather hot. 1st circle was made in 5 hrs. 30 Semicircle, from the light in 4 m. hrs. 30 m., to the light 1 hr. 0 m.: difference 3 hrs. 30 m. 2nd circle was made in 5 hrs. 20 Semicircle, from the light in 3 m. (Late in afternoon: circle hrs. 50 m., to the light 1 hr. 30 completed at 6 hrs. 40 m. P.M.) m.: difference 2 hrs. 20 m. We have here a remarkable instance of the power of light in retarding and hastening the revolving movement. (_See_ ERRATA.) _Convolvulus sepium_ (large-flowered cultivated var.) moves against the sun. Two circles, were made each in 1 hr. 42 m.: difference in semicircle from and to the light 14 m. _Rivea tiliæfolia_ (Convolvulaceæ) moves against the sun, made four revolutions in 9 hrs.; so that, on an average, each was performed in 2 hrs. 15 m. _Plumbago rosea_ (Plumbaginaceæ) follows the sun. The shoot did not begin to revolve until nearly a yard in height; it then made a fine circle in 10 hrs. 45 m. During the next few days it continued to move, but irregularly. On August 15th the shoot followed, during a period of 10 hrs. 40 m., a long and deeply zigzag course and then made a broad ellipse. The figure apparently represented three ellipses, each of which averaged 3 hrs. 38 m. for its completion. _Jasminum pauciflorum_, Bentham (Jasminaceæ), moves against the sun. A circle was made in 7 hrs. 15 m., and a second rather more quickly. _Clerodendrum Thomsonii_ (Verbenaceæ) follows the sun. H. M. April 12, 1st circle was made in 5 45 (shoot very young) 14, 2nd 3 30 18, a semicircle 5 0 (directly after the plant was shaken on being moved) 19, 3rd circle 3 0 20, 4th 4 20 _Tecoma jasminoides_ (Bignoniaceæ) moves against the sun.