Bui. Univ. of Mont, Biol. Series No. 1. 



Plate XIV. 



B 



g K 



0,0 





<» 



(t 



O s: 



C B 



D a 

 2 10' 



"I 



to*"* 



R 



S' 



t-l 



C5 



v. 



D 



