. A laboratory guide for beginners in zoology. Laboratory animals. Introduction XV THE EUGLENA I have generally been able to get the Euglena by this method :, place pieces of bark an inch or more square, preferably from the edge of a pond, in the middle of a beaker or jar holding a pint or more of water. Set the culture vessel in a north window and let it stand. In a few weeks examine the upper and under surfaces of the pieces on the bottom, and you are likely to find Euglena viridis. Euglenae are also likely to be found on the sides and bottoms of many small aquaria. I have had fine lots of t
. A laboratory guide for beginners in zoology. Laboratory animals. Introduction XV THE EUGLENA I have generally been able to get the Euglena by this method :, place pieces of bark an inch or more square, preferably from the edge of a pond, in the middle of a beaker or jar holding a pint or more of water. Set the culture vessel in a north window and let it stand. In a few weeks examine the upper and under surfaces of the pieces on the bottom, and you are likely to find Euglena viridis. Euglenae are also likely to be found on the sides and bottoms of many small aquaria. I have had fine lots of them develop in closed glass plant boxes, which had been temporarily used for keeping frogs. In small salt-water aquaria containing horse-shoe crabs they have also developed in great abun- '^'^^' _ The GRiiEN Euglena: I have also obtained a fine lot of Active form. Magni- Euglena viridis in this way: a glass ^ ' dish two inches high by six inches in diameter was two- thirds filled with vegetable debris —- largely pond scum — from an old spring. It was then filled with water, covered, and placed near a window. After standing undisturbed nearly two months, a thick whitish scum had developed on top, and on the sides of the dish at the surface of the water there was a green growth composed almost entirely of euglenae. In summer and autumn the standing water in the vicinity of barnyards is frequently full of euglense in. 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 Weed, Clarence Moores, 1864-1947; Crossman, Ralph Wallace, 1874- joint author. Boston, D. C. Heath & Co.
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