CULTURING OF AMPHIBIAN EMBRYOS 55 



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MOORE, A. R., 1933 - "Is cleavage rate a function of the cytoplasm or of the nucleus?" Jour. Exp. Biol. 10:230. 



MOORE, J. A., 1940 - "Adaptive differences in the egg membranes of frogs. " Am. Nat. 74:89. 



MORGAN, A. H. G M. GRIERSON, 1932 - "Winter habits and yearly food consumption of adult spotted newts, Triturus virides- 



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 MORGAN, T. H. , 1905 - "The relation between normal and abnormal development of the embryo fo the frog. X. A re-exam- 

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 MORRILL, C. v., 1923 - "The peculiar reaction of the common newt to a liver diet. " Anat. Rec. 26:83. 

 PATCH, E. M. , 1927 - "Biometric studies upon development and growth in Amblystoma punctatum and tigrinum. " Proc. Soc. 



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 PATCH, E. M. , 1941 - "Cataracts in Amblystoma tigrinum larvae fed experimental diets. " Proc. Soc. Exp. Biol. & Med. 



46:205. 

 PETER, K. , 1934 - "Die Gastrulation von Xenopus laevis. " Zetsch. mikr. Anat. Forsch. 35:181. 

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 POLLISTER, A. W. G J. A. MOORE, 1937 - "Tables for the normal development of Rono sylvatica. " Anat. Rec. 68:489. 

 PRATT E. M., 1940 - "Effects of vitamin E deficiency on the tadpole of Rona pipiens. " Univ. Mich. MS. Thesis. 

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Am. Midland Nat. 26:201. 

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• 1942, Vol. 83:309). 

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 STOCKARD, C. R. , 1921 - "Developmental rate and structural expression. " Am. Jour. Anat. 28:115. 



TAYLOR, A. C. G J. J. KOLLROS, 1946 - "Stages in the normal development of Rana pipiens larvae. " Anat. Rec. 94:7. 

 TWITTY, V. C. , 1936 - "Correlated genetic and embryological experiments on Triturus. " Jour. Exp. Zool. 174:239. 

 TWITTY, V. C. G L. E. DeLanney, 1939 - "Size regulation and regeneration in salamander larvae under complete star\'ation. " 



Jour. Exp. Zool. 81:399. 

 TWITTY, V. C. G W. J. van Wagtendonk, 1940 - "A suggested mechanism for the regulation of proportionate growth, supported 



by quantitative data on the blood nutrients. " Growth 4:349. 

 TWITTY, V. C. , 1961 - "Second-generation hybrids of the species of Taricha". Proc. Not. Acad. Sci. 47:1416-1486. 

 TYLER, A., 1942 - "Developmental processes and energetics. " Quart. Rev. Biol. 17:197. 



WEISS, P., 1947 - "The problem of specificity in growth and development. " Yale Jour. Biol. G Med. 19:235. 

 WEISZ, P. B. , 1945 - "The development and morphology of the larva of the South African clawed toad, Xenopus laevis. II. The 



hatching and the first and second form tadpoles," Jour. Morph. 77:193. 

 WILDER, I. W. , 1924 - "The relation of growth to metamorphosis in Eurycea bislineata. " Jour. Exp. Zool. 40:1. 

 WRIGHT, A. H., 1929 - "Synopsis and description of North American tadpoles. " Proc. U.S. Nat. Mus. 74:Art. 11:1. 

 WURMBACH, H.. 1957 - "Le metabolisme de I'eau et la metamorphose des animaux. " 76 Congr. Assoc. France (Perigueux). 



"Embryology is an ancient manuscript icitli niuny of the slieets lost, 

 others displaced, and iiilh spurious passages interpolated by a later hand. " 



Cambridge Natural History, V. 79 



"The very egg itself must liave specific cliaracters althoiigli they may 

 be invisible, and the eggs of different caiimals are really distinct from one 

 another as are their adults, the distinction becoming' more and more vis- 

 ible as development proceeds. " 



O. Hertwig 



