MOTOR RESPONSES 349 



1927a. Structure and function of the eyespot in unicellular and colonial 



organisms. Arch. Protistenk., 60: 197-220. 



1927b. Reversal in photic orientation in Volvox and the nature of photic 



stimulation. Z. vergl. Physiol., 5: 730-38. 



1927c. Response to electricity in Volvox and the nature of galvanic 



stimulation, Z. vergl. Physiol., 5: 740-61. 



1928. Factors involved in changes in form in Aiiioeba. J. exp. Zool., 51 : 



97-120. 



1931a. The nature of response to light in Amoeba proteus (Leidy) . Z. 



vergl. Physiol., 15: 139-47. 



1931b. The nature of the action of electricity in producing response and 



injury in Amoeba proteus (Leidy) and the effect of electricity on the 

 viscosity of protoplasm. Z. vergl. Physiol., 15: 309-28. 



1931c. Movement and response in D/fflugia with special reference to the 



nature of cytoplasmic contraction. Biol. Bull., 61: 223-41. 



1932a. Localized stimulation, transmission of impulses, and the nature 



of response in Amoeba. Physiol. Zo51., 5: 1-15. 



1932b. The rate of adaptation to light and to darkness in Volvox glo- 



bator. Z. vergl. Physiol., 17: 644-58. 



1936. Motor responses to light in the invertebrate animals. Biological 



Effects of Radiation (ed. by B. M. Dugger). New York. Pp. 573-623. 



1939. The relation between kind of food, growth, and structure in 



Amoeba. Biol. Bull. 77: 391-98. 



Mast, S. 0., and Mary Cover. 1922. Relation between intensity of light and 



rate of locomotion in Phacus pleuronectes and Euglena gracilis and its 



bearing on orientation. Biol. Bull. 43: 203-9. 

 Mast, S. 0., and Brainard Hawk. 1936. Response to light in Peranema 



trichophorum. \. Relation between dark-adaptation and sensitivity to 



light. Biol. Bull. 70: 408-12. 

 Mast, S. O., and H. R. Hulpieu. 1930. Variation in the response to light in 



Amoeba proteus with special reference to the effects of salts and hydrogen 



ion concentration. Protoplasma, 11: 412-31. 

 Mast, S. O., and P. L. Johnson. 1932. Orientation in light from two sources 



and its bearing on the function of the eyespot. Z. vergl. Physiol., 16: 



252-74. 

 Mast, S. O., and J. E. Nadler. 1926. Reversal of ciliary action in Paramecium 



caudatum. J. Morph., 43: 105-17. 

 Mast, S. 0., and C. L. Prosser. 1932. Effect of temperature, salts, and hydrogen 



ion concentration on rupture of the plasmagel sheet, rate of locomotion, 



and gel/sol ratio in Amoeba proteus. J. cell. comp. Physiol., 1: 333-54. 

 Mast, S. O., and N. Stabler. 1937. The relation between luminous intensity, 



adaptation to light, and rate of locomotion in Amoeba proteus (Leidy) . 



Biol. Bull., 73: 126-33. 



