Paret, Anna Parmly, [from old catalog] ed · New York and London. Harper & brothers · leaf 321
tank. Scallopst ShrimpSt and Snails Scallops (Fig. 2) when young have a curious way ofchanging their location by means of opening their shellsand then closing them with great force, which sends themofif at an angle, and so they go dancing along the bottom 304 SALT AND FRESH WATER AQUARIUMS till… … constituting a Board of Health in an aquarium; for nosooner does the water become unhealthy than these trans-parent and grasshopper-like creatures will make desperateattempts to jump out of the tank. These shrimps, andthe little hermit-crab, and the buccinum (a small black sea-snail) are Natures…
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