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4. Adrian, E. D., and Matthews, R., /. Physiol. 64:279-301 (1927). Electrical 

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5. Adrian, E. D., and xMatthews, R., /. Physiol. 65:273-298 (1928). Electrical 

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6. Hartley, S. H., Vision: A study of its basis (1941). New York, Van Nostrand. 



7. Bennitt, R., Phj/sJoZ. ZooL 5:65-69(1932). Rhythmic visual pigment migration: 

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8. Bernhard, C. G., Acta Physiol. Scand., vol. 1, Suppl. 1, pp. 1-94 (1940). Neuro- 

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9. Bernhard, C. G., /. Neurophysiol. 5:32-48 (1942). Electrical response of eye: 

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10. Bertholf, L. M., /. Agr. Res. 43:703-713 (1931). Ultraviolet sensitivity in bee. 



11. Bertholf, L. M., Ztsc^r. vergL PfcysioL 18:32-64(1932). Spectral sensitivity of 

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12. Bliss, A. F., /. Gen. Physiol. 26:361-367 (1943). Properties of invertebrate 

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13. Bliss, A. P., /. Biol. Chem. 172:165-178 (1948). Retinal vitamin A formation. 



14. Bliss, A. F., /. Biol. Chem. 176:563-569 (1948). Rhodopsin from the squid 

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15. Blum, H. F., Cold Spring Harh. Symp. Quarjt. Biol. 3:210-213 (1935). Orienta- 

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15a. BoRRADAiLE, L. A., and Potts, F. A., The Invertebrata: A Manual for the Use 

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16. Broda, E. E. and Goodeve, C. F., Proc. Roy. Soc. Land., A. 179: 151-159 (1941). 

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17. Brouwer, B., and Zeeman, W. P. C., Brain 49: 1-35 (1926). Projection of retina 

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18. Byram, G. M., ;. Opt. Soc. Am. 34:571-591 (1944). Distribution of illumination 

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19. Byram, G. M., /. Opt. Soc. Am. 34:718-738 (1944). Visual acuity and photo- 

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20. Chaffee, E. L., Bovie, W. T., and Hampson, A., J. Opt. Soc. Am. 7:1-40 

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21. Charpentier, G., Acta Opthal., Kbh. Suppl. 9 (1936). Electrical response of 

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21a. Chase, A. M., and Smith, E. L., J. Gen. Physiol. 23:21-39 (1939). In vitro 

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22. Clark, VV. E. LeGros, and Penman, G. G., Proc Roy. Soc. Lond., B. 114:291-313 

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23. Crescitelli, F., and Jahn, T. L., /. Cell & Comp. Physiol. 13:105-112 (1939). 

 Electrical response of eyes: grasshopper. 



24. Crescitelli, F., and Jahn, T. L., /. Cell. & Comp. Physiol. 19:47-66 (1942). 

 Oscillator}' electrical activity of eyes: arthropod. 



25. Crozier, W. J., Am. J. Physiol. 36:8-20 (1914). Photic orientation of holothuria. 



26. Crozier, W. J., Zool. Jahrb., Aht. allg. Zool. u. Physiol. 35:233-297 (1915). 

 Sensory reactions of holothuria. 



27. Crozier, W. J., ]. Gen. Physiol. 3:57-59 (1920). Role of integumentary' pigment 

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28. Crozier, W. J., ;. Gen. P/iysioL 19:503-522(1936). Relation of illumination to 

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29. Crozier, W. J., and Wolf, E., /. Gen. Physiol. 24:635-654 (1941). Flicker con- 

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30. Crozier, W. J., and Wolf, E., /. Gen. Physiol. 27:287-313 (1943). Influence 

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31. Crozier, W. J., Wolf, E., and Zerrahn-Wolf, G., /. Gen. Physiol. 20:211-228 

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32. Crozier, W. J., Wolf, E., and Zerrahn-Wolf, G., Proc. Nat. Acad. Sci. 23: 

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