When an insect alights on the central disc, it is instantly entangled by the viscid secretion, and the surrounding tentacles after a time begin to bend, and ultimately clasp it on all sides. If an insect adheres to only a few of the glands of the exterior tentacles, these soon become inflected and carry their prey to the tentacles next succeeding them

Leaf (enlarged) with the tentacles on one side inflected over a bit of meat placed on the disc. C. Darwin.

inwards; these bend inwards, and so onwards, until the insect is ultimately carried by a sort of rolling movement to the centre of the leaf. Then, after an interval, the tentacles on all sides become inflected, and bathe their prey with their secretion, in the same manner as if the insect had first alighted on the central disc.

Specimens showing that, among like objects, synchronous nutrition is often followed by subsequent synchronous action. (Syntrophy.)

239. Bunch of cherries, bearing many fruits in the same stage of development.

240. Carpel of pea, fruit ripe and opened, showing ripe pea seeds growing from the carpel, one ovule was not fertilized. 241. Lupin leaves in various stages of growth; the ratios of growth are similar in each at the various stages of growth.

242. A pot full of seedlings, all grown from similar seed. All have grown alike, and will continue to grow alike under similar circumstances.

Remarks. In all the above cases the objects proceed to grow equally, and are equally nourished, probably because supplied with similar food, and similarly and synchronously stimulated.

243. A swarm of bees. They are gregarious and work together; all have been stimulated by the same antecedents and circumstances.

Examples may be given where the supply of pabulum to various objects has been similar but stimulation unequal.

244. Leaves of a vine. Certain branches growing over a neighbouring flue produced all their leaves earlier than the other branches, and, under stimulation by heat, they grew larger than the leaves of other branches.

245. Gourd, leaves and fruit. A portion of one branch was carried into a dark box, the portion produced all its leaves equally small, but flowers and fruit were perfect. Goodall, Fig. 172.

Specimens illustrating movements in Plants, and the
Mechanism by which their movements are effected.

A. Motion producing organs.

246. Mimosa pudica, fully developed compound leaf. Pulvinism is seen at the base of the main stalk at the base of each leaflet.

247. Oxalis, pulvini are seen at base of each leaflet.

248. Lotus Jacoboeus. Cotyledons with pulvini. Darwin, Movements, p. 116.

B. Specimens showing movement due to modes of growth.

249. Morning glory. A shoot showing method of twining due to unequal bilateral growth of stem. Goodall, Fig. 179.

C. Specimens showing means by which plants climb.

Fig. 16. After C. Darwin. Longitudinal section of a Pulvinus, magnified seventy-five times; p, p petiole of leaf stalk; f, fibrovascular bundle; b, b commencement of blade of cotyledon.

VARIOUS SCIENTIFIC LECTURES AND PAPERS RELATING TO THE SUBJECT OF THIS WORK AND PUBLISHED BY THE AUTHOR.

1877. Loss of associated movements of the eyes under chloroform and in disease. British Medical Journal, March 10th.

1879. Recurrent headaches in children, and associated pathological conditions. British Medical Journal, Dec. 6th.

1880. Recurrent headaches in children. Brain, Part XI. Visible muscular conditions as expressive of states of the brain and nerve-centres. Illustrated. Brain, Parts XII. XIII. and XIV.

1881. Cases illustrating some of the special groups of muscles that may be particularly affected with chorea. Medical Times and Gazette, March 5th.

1882. Defective developmental conditions as seen principally in children. Medical Times and Gazette, Jan. Feb.

Illus

Analogy between the movements of plants and the muscular movements of children, called chorea. trated. British Medical Journal, Feb. 25th.

1882. Atrophy of the muscles supplied by the fifth cranial nerve, with atrophy of the orbital fat on the same side. Remarks. Lancet, Jan. 7th.

Convulsion commencing in the face and hand from the influence of nitrous oxide gas. Lancet, June 17th. 1882. Indications of the nutrition of the brain. Illustrated. Medical Times and Gazette, July 29th.

1882. The study of the face as an index of the brain. Illustrated. British Medical Journal, Oct. 31st.

1883. Cases of chorea illustrating some points in the clinical history and alliances of this morbid condition, with indication of the brain areas most commonly affected. Remarks. Lancet, Feb. 17th.

1883. Spontaneous postures of the hand considered as indications of the condition of the brain. Brain, Part XXIII. Proceedings, Royal Medical Chirurgical Society, Nov. 28th, 1882.

1883. The signs of a healthy brain and mental development in an infant, as indicated by its movements. Medical Times and Gazette, April 21st.

1883. Methods and apparatus for obtaining graphic records of movements of the limbs, etc. Illustrated. British Medical Journal, Sept. 22nd.

1883. A method and apparatus for obtaining graphic records of various kinds of movements of the hand and its parts, and enumerating such movements and their combinations. Journal of Physiology, Vol. IV., No. 2.

This apparatus is deposited in Western Gallery, S. Kensington Museum.

Illus

1884. Considerations concerning the hypothesis of nervecentres, leading to observation and experiment. trated. Medical Times and Gazette, Feb. 2nd.

1884. Studies of postures indicative of the condition of mind, as illustrated in works of art. Illustrated. Journal of Mental Science, April.

1884. The brain of the school child. Social Science Congress. Education department.

1887. The study of nerve-muscular movements; apparatus for their automatic enumeration. Illustrated. Journal of Physiology, Vol. VII., No. 4.

The apparatus is deposited in the Western Gallery, S. Kensington Museum.

1887. "How to study children," an address at College of

Preceptors. Illustrated. Educational Times, Dec. 1st. 1888. The study of cerebral inhibition. Brain, XLIII.