302 KANSAS UNIVERSITY SCIENCE BULLETIN. 



(6). Munson, J. P., 1898. The Ovarian Egg of Limulus: J. M., 

 XV, 2. 



(7). Mertens, H., 1893. Recherches sur la signification du corps 

 vitellin de Balbiani dans I'ovule des Mammiferes et des Oiseaux : 

 Archiv. de Biol, XIII. 



X. PLATES AND EXPLANATION. 



Drawings were made with a camera lucida. A Bansch & Lomb 

 one-sixth-inch objective and one-inch eyepiece were used, except in 

 figures 2, 6, 7, 8, 17, 29, where a one-twelfth-inch objective was em- 

 ployed. Occasionally a still greater magnification has been obtained 



with a one-half-inch eyepiece, viz., figures 3, 4, 5, 25, 32. 



* 



Zoological Laboeatoey, 



Univeesity of Kansas, 

 June 1903. 



