OTTO GLASER. 



our knowledge of the more obscure points in the physiology of 

 egg-production. 



ZOOLOGICAL LABORATORY, 



UNIVERSITY OF MICHIGAN, 

 November 22, 1912. 



LITERATURE. 

 Hargitt, Charles W. 



'99 Some Interesting Egg Monstrosities. Zoological Bulletin, Vol. II. 

 '12 Double Eggs. American Naturalist, Vol. XLVI. 

 Parker, G. H. 



'06 Double Hens' Eggs. American Naturalist, Vol. XL. 

 Riddle, Oscar. 



'n On the Formation, Significance, and Chemistry of the White and Yellow 

 Yolk of Ova. Journal of Morphology, Vol. 22. 



