449 



the Aa. iliacae communes, that lie ventral to them, have been 

 removed. These two vessels, lettered B.TJ. in the figure, are 

 asymmetrically developed, the left being somewhat larger than 

 the right. 



Figs. 12 and 13 are, respectively, ventral and dorsal views of 

 the same preparation. 



In Fig. 12 the conditions are essentially the same as in Figs. 10 

 and 11, with the exception that in Fig. 12 the relations of the 

 ventral union (F.C/.) are slightly changed. Instead of uniting with 



\/.Le.d 



Vi.e.cL,. 



.e.s. 



V.c.e.d^. 



Fig. 12 



Pig. 10. Ventral aspect. Adult ^, Type III, B. 



Fig, 11. Same as Fig. 10 with arteries removed. 



Fig. 12. Ventral aspect. Adult $, Type III, B. 



Fig. 13. Dorsal aspect of Fig. 12. 



Anat. Anz. XVIII. Aufsätze. 



29 



