'riiK Amkuic'an Geologist, Vol. XXX. 
Plate V. 
No. 3. UNEQl'AL VVE.VTHI'.RINC, OF M.\SS. 
N... s. Ml'. I'lCoRlTl-: I'.\KT1.\1.I.N" Tl'-KXI )F.n. 
HliNR^■ A. \V.\RD. 
