THE GLACIAL RANGE CONTRACTION, ETC. 117 



xxxxxxxxxxx X X xxxxxxxxxxxxxxx 

 xxxxxxxxxxx x X xxxxxxxxxxxxxxx 



xxxxxxxxxxx X X xxxxxxxxxxxxxxx 



xxxxxxxxxxx X X xxxxxxxxxxxxxxx 



XX XXXXXXX XX V xxxxxxxx xxxxxx 



XX XXXXXXX x^"^ xxxxxxxx xxxxxx 



^^ XXX XX X xxxxxxxx xxxxxx 



XX XXX XX X xxxxxxxx XXXvXX 



XXXXXXX XXX^g XXXXXXXXXXXXXX XX 



XXXXXXX xxx-^ xxxxxxxxxxxxxx^'xx 



XXXXXX^XXXXgg XXXXXXXXXXXXXXXXXj^ 



xxxxxx'^^xxxx'^ xxxxxxxxxxxxxxxxx"* 



P t/3 t/3 



J3 3 3 



^ '£> --n-i. ri . t-iGf^S 





<u = "n 3 3 3 3 rt tJ3-£ B B 5ll~-^-^^^B~ ■>.'S ■- JJ J! S ti) M en 

 •J oj .= rt rt rt rt .ti ,t- <u »i5 fcS iS >Si S S ~^ ^-^-^ o >^o ^ ^ o C'C'u 



