156 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



APPEN 



Correlation Surface : Transverse 



Firth op Forth, 



Transferee diameter in tenths of millimetres. 



© 



41 



57 58 61J62 63 64 65 



67 68 69 70 71 72 73 74 75 76 77 78 79 



81182 83 84 85 86 87 



II 



a 



a 



•5 



15 

 46 



47 

 48 

 49 

 5H 

 51 

 52 

 53 

 54 

 55 

 56 

 r,7 

 58 

 59 

 60 

 61 

 62 

 63 

 64 

 65 

 ik; 

 67 

 68 

 69 

 70 

 71 

 72 

 73 

 74 

 75 

 7*5 

 77 

 7s 

 79 

 80 



4 10 4 9 8 8 16 13 16 16 14 16 8 |17il6!26 



