. A course in invertebrate zoölogy : a guide to the dissection and comparative study of invertebrate animals. Zoology; Invertebrates. 30 Marvels of Pond-Life. CHAPTER III. FEBRUARY. Visit to Hauipstead—Small ponds—Water-fleas—Water-beetle—Snails —Polyps—Hydra viridis—The dipping-tube—A glass cell—The Hydra and its prey—Chydorus sphsericus and Canthocamptus, or friends and their escapes—Cothurnia — Polyp buds — Catching Polyps—Mode of viewing them—Structure of Polyps—Sarcode— Polyps stimulated by light—Are they conscious ?—Tentacles and poison threads—Paramecium—Trachelius—Motions of Animalcule
. A course in invertebrate zoölogy : a guide to the dissection and comparative study of invertebrate animals. Zoology; Invertebrates. 30 Marvels of Pond-Life. CHAPTER III. FEBRUARY. Visit to Hauipstead—Small ponds—Water-fleas—Water-beetle—Snails —Polyps—Hydra viridis—The dipping-tube—A glass cell—The Hydra and its prey—Chydorus sphsericus and Canthocamptus, or friends and their escapes—Cothurnia — Polyp buds — Catching Polyps—Mode of viewing them—Structure of Polyps—Sarcode— Polyps stimulated by light—Are they conscious ?—Tentacles and poison threads—Paramecium—Trachelius—Motions of Animalcules, whether automatic or directed by a will—Their restless character. |T has been a bitterly cold night, and as the sun shines on a clear keen morning, and glistens in the hoar-frost which covers the trees, it might seem an unpropitious time for visiting the ponds, in search of microscopic prey. We will, however, try our luck, and take a brisk trot to the top of Hampstead Heath, where the air is still keener, and the ice more thick. Arriving at the highest point, London appears on one side enveloped in its usual great coat of smoke, through which St. Paul's big dome, with a score or two of towers and steeples, can be dimly made out; while looking towards Harrow-on- the Hill, or Barnet, we see the advantage of country air in the sharpness with which distant objects cut the blue sky. We leave the large ponds for another time,. 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 Pratt, Henry Sherring, b. 1859. Boston ; London : Ginn & Co.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
