400 



HARPER— ORGANIZATION, REPRODUCTION 



TABLE II. 



Dimensions of Cells in a Series of Fourteen Sixteen-celled Colonies of 



P. asperum as Indicated by their Bases Measured as Arcs of a 



Circle About the Center of the Colony. 



from 71° + to 72° +, 72° being the typical angle for such a group. 

 I have measured the angles occupied by cells 2 and 6, together, as 

 the arc g'^-g'^ which subtends in the average of the fourteen colonies 

 an angle of 143°. Dividing this equally between cells 2 and 6 gives 



