AND INHERITANCE IN PEDIASTRUM. 



409 



TABLE v.— Continued. 

 6. Basal Angles of Cells 7-16. 



The basal angles of the cells of series II. igk, i'^gk, ig^k^, i'^g*k*, 

 etc., also constitute five pairs of correspondingly placed angles right 

 and left of the axis of the colony jun. The average values of each 

 for the series of seven colonies are arranged in corresponding pairs 

 in the table, section 2. In this series the average values of the right 

 and left pairs are seen to be progressively smaller as we pass in the 

 direction from pole n towards pole m in the colony. The values 

 range from 121° in the first pair about the point g to 134° in the 

 pairs about g- and g^. The equivalence of the adjacent basal angles 

 of cells 2-3, 126°, and 3-4, 134°, is to be expected as a characteristic 

 of the type configuration though it is more or less accidental doubtless 

 that it should appear on the basis of so few measurements. The pro- 

 gressive increase in size of the basal angles of these cells is correlated 

 with the reduction in value of the corresponding included angles of 

 cell I proceeding from basal to lateral and apical angles. As shown 

 in the table, column 4, the values of the corresponding angles in the 

 selected type diagram from colony 55 agree fairly well with these 

 averages from the seven colonies. The first pair are smaller in the 

 average from the series. The next three pairs are the same, and the 

 last pair, the basal angles of cell 4, are smaller in the average type 

 than in the selected type. 



