PARABIOSIS AND TEI.OBIOSIS 249 



REFERENCES 



BALTZER, F. , 1941 - "Untersuchungen an Chimaren von Urodelen und Hyla. " Rev. Suisse de Zool. 48:413. 



BURNS, R. K. Jr. , 1935 - "The process of sex transformatiori in parabiotic Amblystoma. III. Conversion of testis to ovary in 



heteroplastic pairs of A. tigrinum and A. punctatum". Anat. Rec. 63: 

 PELS, E. , 1929 - "Experimentelle Studien an Parabiose-Tieren uber Physiologie und Biologie der Sexualhormone. " Arch. f. 



Gynakologie. 138:16. 

 FRITZ-NIGGLI, H. , 1958 - "Radiation chimaeros and parabiosis". Strahlentherapie. 106:378-390. 

 GALLIEN, L. G M. R. COURRIER, 1960 - "Haploide par exerese du pronucleus femelle de I'oeuf feconde chez le Triton Pleur- 



odeles waltii et elevage en parabiose des larves obtenues. " C.r. I'Acad. des Sci. 250:4038. 

 GALLIEN, L. & ]. C. BEETSCHEN, 1960 - "Differentiation sexuelle et gametogenese abotrive chez un male haploide d'Urodele 



eleve en parabiose. " C. r.s.de I'Acad. des Sc. 251:1655. 

 HUMPHREY, R. R. , 1936 - "Studies on sex reversal in Amblystoma. IX. Reversal of ovaries to testesin parobiotic A. tigrinum." 



Jour. Exp. Zool. 73:1. 

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 KAYLOR, C. T. , 1940 - "Experiments on the parabiotic union of haploid and diploid larvae of Triturus pyrrhigaster. " .Anat. Rec. 



78:52 (suppl.). 

 SMITH, P. E. , 1921 - "Some modifications induced by parabiotic union of the hypophysectomized to the normal tadpole. " Anat. 



Rec. 21:83 (abs. ). 

 STONE, L. S. , 1934 - "Production and metamorphosis of chimeras in anurans and urodeles. " Proc. Soc. Exp. Biol. & Med. 



31:1084. 

 WITSCHI, E. , 1937 - "Studies on sex differentiation and sex determination in amphibians. 

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Essays in Bio. , Univ. of Calif. Press. 



"Nature is never more perfect than in small things. " 



Pliny 



"The species is contained in the egg of the hen as completely 

 as in the hen, and the hen's egg differs from the frog's egg as the 

 hen from the frog. " 



C. O. Whitman 



"Between vitalism and mechanism there is a middle ground 

 which may be called 'Organizationism' or 'Emergence', which holds 

 that life, differential sensitivity and reactivity , fitness and psychic 

 phenomena, are results of increasing organization, these properties 

 'emerging' as it were, by a process of creative synthesis. " 



E. G. Conklin, 1944 



"It is the thought transmitting propotency of the human species, 

 more than any other, titat gives it a superlative lead over all the 

 creatures of the globe. " 



A. J. Lotka, 1925 



"Aristotle in his 'De Partibiis Animalium ' maintained that the essence 

 of a living animal is found not in what it is, or how it acts, but why it is as 

 it is and acts as it does. " 



