/ 





iQ2o] HURD—FUCUS SPORES 



49 



I wish to acknowledge with gratitude the encouragement and 



assistance of Dr. T. H. Goodspeed, under whose direction this 



investigation was carried on; and the helpful suggestions of Dr. 



C. M. Child and Dr. N. L. Gardner; and also of Dr. E. F. Lewis, 



who has placed the facilities of the physical laboratories at my 

 disposal. 



University of California 





Berkeley, Cal. 



LITERATURE CITED 



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3. Child, C. M., Individuality in organisms. Chicago. 1915. 



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1916. 



5. Day, E. C, The effect of colored light on pigment-migration in the eye 

 of the crayfish. Bull. Mus. Comp. Zool. 53:303-343. 1911. 



6. Farmer, J. B., and Williams, J. L., On fertilization, and the segmenta- 

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7. , Contributions to our knowledge of the Fucaceae: their life-history 



and cytology. Phil. Trans. Roy. Soc. B. 190:623-645. 1898. 



8. Fromme, F. D., Negative heliotropism of the urediniospore germ-tubes of 

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9. Gross, A. O., The reactions of arthropods to monochromatic lights of 

 equal intensities. Jour. Exp. Zool. 14:467-514. 1913. 



10. Jolivette, H. D. M,, Studies on the reactions of Pilobolus to light stimuli. 



Bot. Gaz. 57:89-121. 1914. 



ii, Kniep, H., and Minder, F., tJber den Einfluss verschiedenfarbigen 

 Lichtes auf die Kohlensaureassimilation. Zeitschr. Bot. 1:619-650. 1909. 



12. Laurens, H., The reactions of amphibians to monochromatic lights of 

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13. MacDougal, D. T., and Spoehr, H. A., The measurement of light in 

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618. 1917. 



14. Mast, S. O., Light reactions in lower organisms. II. Volvox globator. 



Jour. Comp. Neur. and Psych. 17:99-179. 1907. 



15. Parr, R., The response of Pilobolus to light. Ann. Botany 32:177-205. 



1918. 



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