739 



Fig. 2. 



Fig. 3. 



Fig. 4. 



4/d. 



S d 



M.d 



Explanation of Figures. 



A. Aorta. A. c. Alimentary canal. C. Coelom. Gh. Chorda dorsalis. Gl. Glo- 

 merulus. L. Lung. M. d. Müllerian duct or its Anlage. N. Nephrostome. Pr. Pro- 

 nephros. S. d. Segmental duct. 



Figs. 1 — 4 are from sections of a 27 mm Axolotl. 

 » »> 1° >) )> )i >> >i 45 ,, ,, 



„ 17-22 „ „ „ „ „ 51 „ 



In each case the sections are numbered in the order in which they occur, from 

 before backwards. 



