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



Plate IX. 



p 



tic. 

 crc 



DC 



C5 

 P7 



o. 



rv 



Q 



CO 



C 





~~~ 



& 



a; 



d" 



cc 



Q 



o 



S3 



a 



