No. 2.] THE STOLOX IX AUTOLYTUS. 93 



than in the solitary stolon forms. In marked contrast to the 

 variations in A. varians is the constancy in the position of 

 the bud in A. cornutus, where new segments even are formed 

 for the maintenance of a fixed position of budding. 



URSINUS COLLEGE, COLLEGEVILLK, PA., 

 Nov. 1 6, 1899. 



