. Evenings at the microscope : or, Researches among the minuter organs and forms of animal life . Zoology; Microscopy; Microscopes. 816 EVENINGS AT THE MICROSCOPE. sions; and therefore I will merely say here that each one of these tiny vesicles carries a barbed and poisoned arrow, which can be shot forth at the pleasure of the animal with great force, and to an amazing length ; that hundreds are usually shot together ; and that this is the provision which the All-wise God has given to these apparently helpless animals for securing and subduing their prey. There is, however, another \ organ sti
. Evenings at the microscope : or, Researches among the minuter organs and forms of animal life . Zoology; Microscopy; Microscopes. 816 EVENINGS AT THE MICROSCOPE. sions; and therefore I will merely say here that each one of these tiny vesicles carries a barbed and poisoned arrow, which can be shot forth at the pleasure of the animal with great force, and to an amazing length ; that hundreds are usually shot together ; and that this is the provision which the All-wise God has given to these apparently helpless animals for securing and subduing their prey. There is, however, another \ organ still more conspicuous in \ our little Sarsia, of which I have not yet spoken. As the whole animal has the most absolute transparency, we see that the roof of the bell is much thicker than the sides, and that it gradu- ally thins off to the edge. The interior surface is called the sub- umbrella, and it carries within its substance four slender tubes, which, radiating from the centre of the roof, proceed to the mar- ! gin, where they communicate / with another similar canal which j runs round the circumference, / sending off branches into the / tentacles. This is the circulatory sarsia. system; and you may see, with the magnifying power which you are at present using, that a clear fluid is moving rapidly within all these canals, carrying minute granules; not with an even forward current, but with an irregular jerk- ing movement, as if several conflicting eddies were in the stream. Yet we discern that, on the whole, the granules are moved forward ; passing from the centre of radiation. / /. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gosse, Philip Henry, 1810-1888. London : Society for Promoting Christian Knowledge
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