publications 
OF THE 
^University of Pennsylvania 
Contributions 
(W iJLrthu FR0M THE 
ZOOLOGICAL LABORATORY 
A 
FOR THE YEAR 
I899 
Comparative Cytological Studies with Especial 
Regard to the Morphology of 
the Nucleolus 
BY 
Thomas H. Montgomery, Jr., Ph. D. 
Assistant Professor of Zodlogy in the University of Pennsylvania 
Reprinted from Journal of Morphology, Vol. XV, No. 2 
Ginn & Co., Selling Agents, Boston, Mass. 
1900 
VP 
