Nitrogen Excretion 207 



38. Florkin, M., and Frappez, G., Arch. Internat. Physiol. 50:197-202 (1940). 

 Ammonia in invertebrate bloods. 



39. Florkin, M., and Honet, R., Arch. Internat. Physiol. 47:125-132 (1939). Am- 

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40. Folin, O., Am. ). Physiol. 13:45-65 (1905). Analyses of human urine. 



41. Fosse, R., and Brunel, A., C. R. Acad. Sci. 188:1067-1069 (1929). Distribution 

 of allantoinase. 



42. Friedman, M., and Byers, S. O., ;. Biol. Chem. 175:727-735 (1948). Uric acid 

 excretion, Dalmatian dog. 



43. Fuse, N., ]ap. ]. Med. Sci. U, 1:103-110 (1925). Nitrogen in urine of various 

 mammals. 



44. Grafflin, a. L., and Gould, R. G., Biol. Bull. 70:16-27 (1936). Nitrogen 

 excretion, trimethylamine oxide, sculpin, flounder. 



45. Grah,H., Zool. ]ahrh., Abt. allg. Zool.u. Physiol. 57:355-372(1937). Uric acid 

 synthesis, Hehx. 



46. Grollman, a., /. Biol. Chem. 81:267-278 (1929). Nitrogenous excretion by 

 goosefish, Lophius. 



47. Hammett, F. S., /. Biol. Chem. 22:551-558 (1915). Urinary nitrogen, cat. 



48. Heidermanns, C., Zool. jahrh., Aht. allg. Zool. u. Physiol. 58:57-68 (1937). 

 Urea synthesis by earthworm. 



49. Heidermanns, C., Tabid. Biol. 14:209-273 (1937). Uric acid in invertebrate 

 tissues. 



50. Heyde, H. C. v., /. Biol. Chem. 46:421-430 (1921). Nitrogenous constituents of 

 urine and blood of Rana. 



51. Hollande, a. C., and Cordebard, H., Bull. Soc. Chim. Biol. 8:631-634 (1926). 

 Nitrogen excretion by clothes-moth. 



52. Hopping, A., Am. }. Physiol. 66:145-163 (1923). Nitrogenous excretion by 

 alligator. 



53. Hunter, A., Proc. Roy. Soc. Lond., B. 97:227-242 (1924). Arginase in fish. 



54. Hunter, A., and Dauphinee, J. A., Proc. Roy. Soc. Lond., B. 97:227 242 (1925). 

 Distribution of arginase. 



55. Krebs, H. a., and Henseleit, K., Ztschr. physiol. Chemie 210:33-66 (1932). 

 Arginase in animal tissues. 



56. Lawrie, N. R., Biochem. ]. 29:2297-2302 (1935). Nitrogenous excretion, ciliate 

 Glaucoma. 



57. LiLiFERr,H., Zool. ]ahrh., Aht. allg. Zool. u Physiol. 55:131-170,171-190(1934). 

 Nitrogen excretion and purine metabolism in Lepidoptera. 



58. Lewis, H. B., Science 48:376 (1918). Nitrogen in urine of reptiles. 



59. Loeb, L., and Bodansky, O., /. Biol. Chem. 67:79-90 (1926). Urease in Limulus. 



60. LwoFF, A., and Roukhelmann, N., C. R. Acad. Sci. 183:156-158 (1926). 

 Nitrogenous excretion, ciliate, Glaucoma. 



61. Manderscheid, H., Biochem. Ztschr. 263:245-249 (1933). Ornithine cycle, 

 vertebrates. 



62. Marshall, E. K., /. Cell. & Comp. Physiol. 2:349-353 (1933). Urea secretion, 

 frog. 



63. Mayrs, E. B., /. Physiol. 58:276-287 (1924). Nitrogen excretion by hen. 



64. MoLLiTOR, A., Zool. Jahrh., Aht. allg. Zool. u. Physiol. 57:323-354 (1937) 

 Nitrogen excretion, crab Eriocheir. 



65. MoRGULis, S., /. Bio/. CheiH. 50:52-54(1922). Uric acid in polychaetes. 



66. Munzel, p., Zool. Jahrh.. Aht. allg. Zool. u. Physiol. 59:113-148 (1938). Urea 

 synthesis by vertebrates. 



67. Nardone, R. M., Fed. Proc. 8:117 (1949). Nitrogenous excretion, Colpidium. 



68. Needham, J., /. Exper. Biol. 4:114-144 (1926). Nitrogen metabolism in avian 

 development. 



69. Needham, J., Chemical Embryology (1931). Cambridge Univ. Press. Vol. 2, 

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70. Needham, J., Biochem. J. 29:238-251 (1935). Uricotelism and habitat of gas- 

 teropods. 



71. Needham, J., Biol. Rev. 13:224-251 (1938). Nitrogen excretion, snails, as exam- 

 ple of reversibility in evolution. 



