. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 208 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS. -0°/180° 0°/18(f Figure 1. Intcnsitv (). partial i>nUiri:iilii>n IB, E) unit direction of polarization (C, F) images /'Euprymna scolopes (A-C) ami Loligo pealei (D-F). Partial polarization, ilefmed as the ratio of the intensity of the linearly polarized component to the total intensity of the light beam, ranges from II to I 10-100%) ami is coiled into a grey scu/e where black represents depolarized light and white codes for full linear polarization. Direction / p
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 208 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS. -0°/180° 0°/18(f Figure 1. Intcnsitv (). partial i>nUiri:iilii>n IB, E) unit direction of polarization (C, F) images /'Euprymna scolopes (A-C) ami Loligo pealei (D-F). Partial polarization, ilefmed as the ratio of the intensity of the linearly polarized component to the total intensity of the light beam, ranges from II to I 10-100%) ami is coiled into a grey scu/e where black represents depolarized light and white codes for full linear polarization. Direction / polarization, ranging from Of to l«0° in the counter-clockwise orientation, is coded such that hlack or white represent CF/18CF (horizontal polarization) and 50% grey codes for the 90° direction, which is vertical polarization. that appears unrelated to the animal's behavior. The functions of these polarized reflections as well as the roles of these species' polarization sensitivity (2) are yet to be determined. We are grateful to W. Mebane and J. Hanley for their assis- tance in maintaining our animals. Comments by two reviewers greatly improved the manuscript. This study was supported by a Grass Foundation fellowship to Literature Cited Moody, M. K., and J. R. Parriss. 1960. Nature 186: 839-840. Jander, R., K. Daumer, and T. H. Waterman. 1963. / ;l. I'hysiol. 46: 383-394. Saidel, W. M., J. Y. Lettvin, and E. F. McNichol. 1983. Nature 304: 534-536. 4. Shashar, N., and T. W. Cronin. 1996. J. ;. Riol. 199: 999- 1004. 5. Shashar, N., P. S. Rutledge. and T. W. Cronin. 1996. J. Exp. Biol. 199: 2077-2084. 6. Cronin, T. W., N. Shashar, and L. Wolff. 1995. Biophotonics Int. 2: 38-41. 7. Hanlon, R. T., and .1. B. Messenger. 1996. Ccphalopod Behav- iour. Cambridge Univ. Press. 8. Hanlon, R. T., M. F. Claes, S. E. Ashcraft, and P. V. Dunlap. 1997. Riol. Bull. 192: 364-374. 9. Cronin, T. W., N. Shashar, and L. Wolff. 1994. Proc. 12 Int. Con. Pattern Recognition 60
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