Archive image from page 83 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 60 THE DAWN OF LIFE. is clear or transparent and more dense than tlie inner mass, wliicli seems granular. It lias at one end a curious vesicle wliicli can be seen gradually to expand and become filled with a clear drop of liquid, and then suddenly to contract and expel the contained fluid through a series of pores in the adjacent part of the outer wall. This
Archive image from page 83 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 60 THE DAWN OF LIFE. is clear or transparent and more dense than tlie inner mass, wliicli seems granular. It lias at one end a curious vesicle wliicli can be seen gradually to expand and become filled with a clear drop of liquid, and then suddenly to contract and expel the contained fluid through a series of pores in the adjacent part of the outer wall. This is the so-called pulsating vesicle, and is an organ both of circulation and excretion. In another part of the body may be seen the nucleus, Fig. 12. Amceba. Fm. 13. Actinophrys. From criginal sketches. which is a little cell capable, at certain times, of pro- ducingv by its division new individuals. Food when taken in through the wall of the body forms little pellets, which become surrounded by a digestive liquid exuded from the enclosing mass into rounded cavities or extemporised stomachs. Minute granules are seen to circulate in the gelatinous interior, and may be substitutes for blood-cells, and the outer layer of the
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