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of which are greatly extended lengthways. The smooth fibre-cells are long, spindle-shaped, Fig. 45.—Two smooth muscular fibres from the small intestine of a frog. somewhat cylindrical, bodies with pointed ends, about one-two-hundredth of an inch long by one-five-thousandth of an inch in breadth. Fig. 46.—striated muscle of frog. 1, effects of water ; s s′, sarcolemma. 2, action of acetic acid, showing nuclei at k. 3, action of caustic potash. 4, branched muscle-fibre from the tongue. All magnified about 50 diameters. This kind is found in the coats of the hollow organs, like the stomach, and it is not subject to voluntary control. The other is called