REFERENCES TO THE LITERATURE 239 



KING, HELEN D. 1911 b The sex ratio in hybrid rats. Biol. Bull., vol. 21, 

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1913 Some anomalies in the gestation of the albino rat (Mus nor- 

 vegicus albinus). Biol. Bull., vol. 24, pp. 377-391. 

 1913 a The effects of formaldehyde on the brain of the albino rat. J. 

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1915 On the weight of the albino rat at birth and the factors that in- 

 fluence it. Anatomical Record, vol. 9, pp. 213-231. 



KING, HELEN D. AND STOTSENBURG, J. M. 1915 On the normal sex ratio and 

 the size of the litter in the albino rat (Mus norvegicus albinus). Ana- 

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KING, JESSIE L. 1910 The cortico-spinal tract of the rat. Anat. Rec., vol.4, 

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KIRKHAM, WILLIAM B. 1910 Ovulation in mammals, with special reference to 

 the mouse and rat. Biol. Bull., vol. 18, pp. 245-251. 



KIRKHAM, WILLIAM B. AND BURR, H. S. 1913 The breeding habits, maturation 

 of eggs and ovulation of the albino rat. Am. J. Anat., vol. 15, pp. 291- 

 317. Six excellent plates illustrating the egg in various phases. 



KLEBS, E. 1891 Zur vergleichenden Anatomic der Placenta. Archiv. f . mikr. 

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KLEIN, EDWARD UND VERSON, E. 1871 Der Darmkanal. In Strieker's Hand- 

 buch der Lehre von den Geweben des Menschen und der Tiere. See 

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KLEIN, E. 1875 The anatomy of the lymphatic system. II. The lung. Smith, 

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 guinea pig. Rat among other animals used. 



KLUNZINGER, C. B. 1908 Ueber unsere Ratten und Mause, deren Schaden und 

 Bekampfung. Jahresh. Ver. vaterl. Naturk. Wurttemberg Jahrg., 

 64 p. xxxi-xxxviii. 



KNAPP, PAUL 1908 Experimenteller Beitrag zur Ernahrung von Ratten mit 

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KOCH, MATHILDE L. 1913 Contributions to the chemical differentiation of the 

 central nervous system. I. A comparison of the brain of the albino 

 rat at birth with that of the fetal pig. J. Biol. Chem., vol. 14, pp. 

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KOCH, W. AND MANN, S. A. 1909 A chemical study of the brain in healthy and 

 diseased conditions, with especial reference to dementia praecox. 

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KOCH, WALDEMAR AND KOCH, MATHILDE L. 1913 Contributions to the chemical 

 differentiation of the central nervous system. II. A comparison of 

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1913 a Contributions to the chemical differentiation of the central 

 nervous system. III. The chemical differentiation of the brain of 

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