140 R. H. RICHENS 



are referred to as samples a and b, respectively; in Fig. 2, the a samples are on the left, 

 in Table 1, the a samples are above the h. The measurements pertaining to each sample 

 are given in Table 1 . To simplify the presentation of the data, each character is expressed 

 in terms of a scale of 10 units (0-9), the order of the characteristics being (1) relative 



Fig. 2. Specimen leaves from major square 52. The figures are the grid reference coordinates of the minor 



squares. 



