2O6 MAYNIE A. CURTIS. 



10. Landois, H. 



'99 Huhner-Eier in der freien Bauchhohle. 27 Jahresb Westfalischen 

 Prov.-Vereins f. Wiss. und Kunst, 1898-99, pp. 52-53. 



11. Pick, E. W. 



'n Egg Abnormalities. Poultry World (London), Vol. 7, p. 495. 



12. Parker, G. H. 



'06 Double Hens' Eggs. American Naturalist, Vol. XL., pp. 13-25. 



13. Patterson, J. T. 



'n A Double Hen's Egg. American Naturalist, Vol. XLV., pp. 54-59. 



14. Pearl, R. and Curtis, M. R. 



'12 Studies on the Physiology of Reproduction in the Domestic Fowl. V. 

 Data Regarding the Physiology of the Oviduct. Jour. Exper. Zool., 

 Vol. 12, pp. 99-132. 



15. Pearl, R. and Curtis, M. R. 



'14 Studies on the Physiology of Reproduction in the Domestic Fowl. 

 VIII. On Some Physiological Effects of Ligation, Section, or Removal 

 of the Oviduct. Ibid., Vol. 17, pp. 395-424. 



