STRUCTURE AND DEVELOPMENTAL RATE 265 



Mall, F. P. 1908 A study of the causes underlying the origin of human mon- 

 sters. Jour. Morph., vol. 19. 



1917 Cyclopia in the human embryo. Publication 226 of Carnegie 



Institution of Washington, p. 5. 



1917 On the frequency of localized anomalies in human embryos and 



infants at birth. Am. Jour. Anat., vol. 22, p. 49. 

 MiTROPHANOw, P. 1895 Teratogenetische Studien. Arch. Entw.-Mech., vol. 1. 

 Morgan, T. H. 1893 E.xperimental studies on teleost eggs. Anat. Anz., Bd. 



8, S. 803. 



1895 Half-embryos and whole-embryos from one of the first two 



blastomeres of the frog's eggs. Anat. Anz., Bd. 10, S. 623. 

 Morrill, C. V. 1919 Symmetry reversal and mirror imaging in monstrous 



trout and a comparison with similar conditions in human double 



monsters. Anat. Rec, vol. 16, no. 4, p. 265. 

 Newman, H. H. 1917 The biology of twins. Univ. of Chicago Press. 



1917 On the production of monsters b}^ hybridization. Biol. Bull., 



vol. 32, p. 306. 

 Newman, H. H., and Patterson, J. T. 1910 Development of the nine-banded 



armadillo from the primitive-streak stage to birth; with special ref- 

 erence to the question of specific polyembryony. Jour. Morph., vol. 



21, p. 359. 

 Oppermann, K. 1913 Die Entwicklung von Forelleneiern nach Befruchtung 



mit radiumbestrahlten Samenfaden. Arch. f. mikr. Anat., Bd. 83. 

 Patterson, J. T. 1907 On gastrulation and the origin of the primitive streak 



in the pigeon's egg. Preliminary notice. Biol. Bull., vol. 13, p. 251. 



1909 Gastrulation in the pigeon's egg — a morphological and experi- 

 mental study. Jour. Morph., vol. 20, p. 65. 



1913 Polyembryonic development in Tatusia novemcincta. Jour. 



Morph., vol. 24, p. 559. 

 ScHULTZE, O. 1-895 Die kiinstliche Erzeugung von Doppelbildungen bei 



Froschlarven mit Halfe abnormer Gravitationswirkung. Arch. 



Entw.-mech., Bd. 1. 

 Spemann, H. 1901-1903 Entwicklungsphysiologische Studien am Triton-Ei. 



I, Arch. Entw.-mech., Bd. 12; II, Arch. Entw.-mech., Bd. 15, 1903; III, 



Arch. Entw.-mech., Bd. 16, 1903. 

 Stockard, C. R. 1907 .The artificial production of a single median cyclopean 



eye in the fish embryo by means of sea-water solutions of magnesium 



chloride. Arch. f. Entw.-mech., Bd. 23. 



1909 a The origin of certain types of monsters. Amer. Jour. Obs., 



vol. 59. 



1909 b The development of artificially produced cyclopean fish, 

 'The magnesium embryo.' Jour. Exp. Zool., vol. 6, p. 285. 



1910 a The influence of alcohol and other anaesthetics on embryonic 

 development. Am. Jour. Anat., vol. 10, p. 369. 



1910 b The independent origin and development of the crystalline 

 lens. Am. Jour. Anat., vol. 10, p. 393. 



1913 a The artificial production of structural arrests and racial 

 degeneration. Proc. N. Y. Path. Soc, vol. 13, N. S. 



