. Contributions. Biology. Fig. 18. For description, see Case 7. Fig. 19. For description, see Case 8. Case 8. Larva oriented with back above; light enters from below —Under these conditions of orientation, the nature of the reaction was similar to that described in Case 6. Usually there resulted a direct backward rotation through a few degrees, which produced a new swimming position, Fig. 19, B'. This was usually constant while the conditions of light remained the same, but it was some- times interrupted by backward rotations through an arc of greater extent, or even by a variable number of co
. Contributions. Biology. Fig. 18. For description, see Case 7. Fig. 19. For description, see Case 8. Case 8. Larva oriented with back above; light enters from below —Under these conditions of orientation, the nature of the reaction was similar to that described in Case 6. Usually there resulted a direct backward rotation through a few degrees, which produced a new swimming position, Fig. 19, B'. This was usually constant while the conditions of light remained the same, but it was some- times interrupted by backward rotations through an arc of greater extent, or even by a variable number of complete backward rota- tions through 360°. At the end of these, however, the new swim- ming position B' was invariably assumed. Combinations of the. 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 Brown University. Biological Laboratory. Providence, R. I
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