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56. BuDDENBRocK, W. V., and Rohr, G. v., Ztschr. dig. Physiol. 20:111-160 (1923). 

 Respiration and critical tensions; insects. 



57. Burrows, M. T., Proc. Soc. Exper. Biol. & Med. 18:133-136 (1920). Oxygen- 

 lack sensitivity in chick, 



58. Calugareanu, D., Arch. ges. Physiol. 120:425-450 (1907). Gas exchange in fish 

 intestine. 



59. Carlson, A. J., and Luckhardt, A. B., Am. ]. Physiol. 54:55-95, 261-306 

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*^ 60. Carter, G. S., Biol. Rev. 6:1-35 (1931). Aquatic and aerial respiration. 



61. Carter, G. S., /. Linn. Soc. Zool. 39:219-233 (1935). Respiration in electric eel. 



62. Carter, G. S., and Beadle, L. C, /. Linn. Soc. Zool. 37:197-203, 327-368 

 (1930). Respiratory adaptations in fish. 



63. Carter, G. S., and Beadle, L. C, /. Linn. Soc. Zool. 37:379-386 (1931). 

 Respiratory adaptations; ohgochaetes. 



64. Chadwick, L. E., Biol. Bull. 93:229-239 (1947). R. Q.; Drosophila in flight. 



65. Chadwick, L. E., and Gilmour, D., Physiol. Zool. 13:398-410 (1940). Respira- 

 tion and wing rate; Drosophila. 



66. Chaetum, E. P., Tr. Aw. Micr. Soc. 53:348-407(1934). Pulmonate respiration. 



67. Chapin, J. L., and Rahn, H., Fed. Proc. 7:19-20 (1948). CO. insensitivity; 

 beaver. 



68. Chevillard, L., Hamon, P., and Mayer, A., Ann. Physiol. Physiochim. Biol. 

 13:1145-1163 (1937). Temperature and oxj'gen consumption; mice. 



69. Clark, R. T., Jr., Stannard, J. N., and Fenn, W. O., Fed. Proc. 8:26 (1949). 

 Carbon monoxide conversion; turtles and mice. 



70. Clausen, H. J., ). Cell. & Comp. Physiol. 8:367-386 (1936). Metabohsm of 

 brown snake. 



71. Cleveland, L. R., Biol. Bull. 48:309-325 (1925). O^ defaunation; termite. 



72. Clowes, G. H. A., and Krahl, M. E., /. Gen. Physiol. 20:145-171 (1936). 

 Metabolic stimulation. 



73. Conant, J. B., Cramer, R. D., Hastings, A. B., Klemperer, F. W., Solomon, 

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 mammals. 



74. Cook, S. F., and Smith, R. E., /. Cell. & Comp. Physiol. 19:211-219 (1942). 

 Termite metabolism. 



75. Cori, C. F., BioL S>'wp. 5:131-140(1941). Phosphorylation mechanisms. 



76. Cousin, G., Bull. Biol. France e. Belg. (Suppl.) 15:341 (1932). Pupal metabol- 

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77. Crescitelli, F., ]. Cell. & Comp. Physiol. 6:351-368 (1935). Respiratory 

 metabolism; bee moth. 



78. Crile, G. W., Intelligence, Power, and Personahty (1941). N. Y., McGraw 

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79. Crozier, W. J., ;. Gen. Physiol. 7:189-216 (1924). Thermal increments. 



80. Crozier, W. J., and Stier, T. B., /. Gen. Physiol. 7:429-447, 699-704 (1925). 

 Respiratory thermal increments. 



81. Csik, L., Ztschr. vergl. Physiol. 27:304-310 (1939). Oxygen requirements; 

 Drosophila. 



82. Cunningham, J. T., and Reid, D. M., Proc. Roy. Soc. Lond., B. 110:234-248 

 (1932). Oxygen secretion by lungfish gills. 



83. Dahr, E., Lunds. Univer. Aarsskr. N. F. Avd. 2, 20, No. 10:1-19 (1924). Lung 

 movements in pulmonate snails. 



*-^ 84. Dam, L. van, /. Exper. Biol. 12:86-94 (1935). Oxygen utilization; Mya. 



85. Dam, L. van, Zool. Anz. 118:122-128 (1937). Respiration in annelids. 



86. Dam, L. van. Dissertation (1938). Groningen. Utihzation of oxygen and regula- 

 tion of breathing; aquatic animals. 



87. Das, B. K., Phil. Tr. Roy. Soc. B. 216:183-219 (1927). Air-breathing fish. 



88. Dausend, K., Ztschr. vergl. Physiol. 14:557-608 (1931). Tubifex respiration. 



89. Davey,D.G., ]. Exper. Biol. 15:217-224(1938). Nematode respiration. 



90. Davis, R. A., and Fraenkel, G., /. Exper. Biol. 17:402-467 (1940). Oxygen 

 consumption of flies during flight. 



