CHROMOSOME NUMBER AND PAIRS IN AMBYSTOMA 223 



Della Vallb, Paola 1909. L'oiganizzazione della cromatina studiata mediante 

 il numero dei cromosomi. Archivio Zoologico Ital., vol. i. 



1911 La continuita delle forme di divisione nucleare ed il valore 

 raorfologico dei eromo.somi. Archivio Zoologico Ital., vol. 5. 



1912 La morfologia della cromatina dal punto di vista fisico. Archivio 

 Zoologico Ital., vol. 6. 



Edward.s, C. L. 1910 The idiochroinosomes in Ascaris megalocephala and 



Ascaris lumbricoides. Arch. f. ZelF., Bd. 5. 



1911 The sex chromosomes in Ascaris felis. Arch. f. Zellf., Bd. 7. 

 Farmer, J. B., and Digby, L. 1914 On dimensions of chromosomes considered 



in relation to phylogeny. Phil. Trans. Royal Soc. London, vol. 205. 

 FiCK, R. 1893 iiber die Reifnng und Befruchtvmg des Axolotleies. Zeitschr. 



wiss. Zool., Bd. 56. 

 Flemming, W. 1882 a Zellsubtanz, Kern und Zelltbeilung. Leipzig. 



1882 b Beitrage zur Kenntnisse der Zelle und ihrer Lebenserschein- 



angen. III. Theil. Arch. f. mikr. Anat., Bd. 20. 



1890 Uber Theilung von Leucocyten. Internat'l. Med. Congr. Verb., 

 Bd. 2. 



1891 Neue Beitrage zur Kenntniss der Zelle. II. Theil. Arch. mikr. 

 Anat., Bd. 37. 



Frolowa, S. 1912 Idiochromosomen bei Ascaris megalocephala. Arch. f. 



Zellf., Bd. 9. 

 Galton, Fr. 1907 Grades and deviates. Biometrika, vol. 5. 

 Haecker, V. 1899 Praxis und Theorie der Zellen- und- Bctruchtungslehre. 



Jena. 

 Haxce, R. T. 1917 a The fixation of mammalian chromosomes. Anat. Rec, 



vol. 12. 



1917 b The diploid chromosome complexes of the pig (Sus scrofa) 



and their variation. Jour. Morph., vol. 30. 



1917 c The somatic mitoses of the mosquito, Culex i)i])iens. Jour. 

 Morph., vol. 28. 



1918 a Variations in the number of somatic chromosomes of Oenothera 

 scintillans. Genetics, vol. 3. 



1918 b Variations in .somatic chromosomes. Biol. Bull., vol. 35. 

 Hart.manx, F. A. 1913 Variations in size of chromosomes. Biol. Bull., vol. 24. 

 Harvey, Ethel Browne 1916 A review of the chromosome numbers in the 



Metazoa. Part I. Jour. Morph., vol. 28. 



1919 Ibid. Part II. In press. 

 Heidenh.\in, M. 1907 Plasma und Zelle. Bd. I. Jena. 



Holt, Caroline 1917 Multiple complexes in the alimentary tract of Culex 



pipiens. Jour. Morph., vol. 29. 

 Hoy, W. E. 1914 A preliminary account of the chromosomes in the embryos of 



Anasa tristis and Diabrotica vittata. Biol. Bull., vol. 27. 



1916 A study of .somatic chromosomes. I. Ibid., vol. 31. 



1918 A study of the somatic chromosomes. II. Ibid., vol. 35. 

 Jansens. F. a. 1905 Evolution des auxocytes males du Batrachocejis atten- 



uatus. La Cellule, T. 22. 



1909 La theorie de la cliiasmatypie. Nouvelle interpnUation des 



cineses de maturation. La Cellule, T. 25. 



JOURNAL OF -MORPHOLOtiY, VOL. 33, NO. 1 



