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SAMAYASARA
repeated the tentacles were eagerly awaiting for small bits of bread and the moment these pieces were introduced without further examination they were pushed in. When this behaviour was fully developed, he introduced pieces of card-board, the first piece of caidboard was eagerly caught and shoved in. After a little while this was brought out without being digested and kicked away by the tentacles. Afterwards this primitive organism was able to recognise the difference between the piece of bread and piece of cardboard. The latter when introduced would be kicked away without ceremony a characteristic behaviour fully illustiative of the purposive nature of life activity
The next stage in the sensory development consists in the appearance of the beginnings of eye which will be sensitive to light. Certain other cells about the frontal orifice develop a sensitiveness to light which is the primitive representative of future-Eye-of the higher organism. The differentiation of cells thus responding to different sensory stimuli constitutes the origin of the different sense organs, which naturally must get coordinated by interconnections if they are to subserve the gencral purpose Such interconnections of these sensory regions from the primitive nervous system form the brain of the higher organism.
Let us pursue the development of the sensory organism and the other systems in the higher organisms. All this development in the multicellular organism is associated with acquatic organisms. When these animals become amphibians partly living on earth and water, then there is the scope of further sensory development of hearing. The latter evolution branches off in two directions one towards the fowls of the air and the other towards the beasts of the earth.
Confining ourselves to the career of the quadrupcds we find a wonderful development of the nervous system and specially the brain. Examination of the brain of the lowest types of quadruped, say the rabbit, we find that the whole mass of the brain consists of the sensory centres connecting with the peripheral sensory organs, such as taste, smell, touch sight and sound. Besides these central sensory organs and the
