870 
J. FRANK DANIEL 
day the last one of her young died from cold. Lactation, in this 
case, was installed and continued for four days, but that it did not 
delay fertilization is shown by the fact that the mouse gave birth 
to young j Qst 20 days after copulation. 
BIBLIOGRAPHY 
Lams, H. et Doorme, J. 1907 Maturations et Fecondation de L'oeuf des 
Mammifers. Arch, de Biol.. 23, pp. 259-365. 
Long. J. A. 1910 Maturation of the egg of the mouse. Carnegie Institution 
Publication. 
SoBOTTA. J. 1895 Die Befruchtung und Furchung des Eies der Maus. Arch, 
f. niik. Anat. 45. pp. 15-93. 
