Mast, Samuel Ottmar, 1871- · New York : J. Wiley & Sons · leaf 210
ion indicate that this is not only the most sensitiveregion, but that it is the only region sensitive to light. At X84 UGBT AND THE BEHAVIOR OP ORGANISMS the anterior end there are two minute cone-shaped pro-tuberances not over 0.5 mm. apart (Fig. 30). These pro-tuberances can barely be seen with… … I ■ ■ • ■ } U Smnii—r^ Fig. 30. Musca larva. A, side view anterior end expanded; ajp., anterioripiracular process showing sovcn spiracular papillae; oJ, optic tubercle. AfterHewitt (1908, PI. 30, Fig. 9). B, camera outline, dorsal view showing anteriorend expanded. C, same showing anterior end…
Light · Phototropism
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