Studies on Regulation. 



'2'S'J 



ments given are reduced to millimeters. The table gives simply 

 the measurements of the pieces concerned; not of the whole 

 animal from which they were taken. The first measurements of 



Table of Measurements. 



each series, however, give the dimensions of the piece as they were 

 at the time of section. 



Certain of the headings of the vertical columns require brief 

 explanation; the eighth column is headed "To level where decrease 

 in width begins;" the anterior region of the body is the widest part 



