SELECTION ON THE YMilABILITY AND CORRELATION OF ORGANS. 
Key to Selective Correlation Tallies. 
Case. 
Yalues of 
r^s■ 
(«) 
0 
0 
(b) 
0 
•25 
(c) 
0 
•5 
(d) 
0 
•75 
C) 
0 
1 
(,/■) 
•2.-) 
•25 
(.'/) 
• 25 
•5 
C) 
■ 25 
• 75 
(d 
• 25 
1 
(./) 
• 5 
• 5 
(C 
• o 
• 75 
(/) 
• 5 
1 
{m) 
• 75 
• 75 
(C 
• 75 
1 
(/') 
1 
1 
Formula ; 
U' — It + 1*1 ^1-1 + "1 ^^’l2 “1“ (^'13^^') "t" {^'-33^) ^’’230 
Occasionally seccnd differences must Re nsed. 
