GEOLOGICAL SURVEY 



ONOGRAPFi ;X PLATE XV! 



- V— . 7 



14 



I 



^^-U^WUBMoi^^ 



ii?*.* 



12 



11 



4^ -^ 



20 



19 



/ 



13 



R .P vVi-.-i :f i e 1 d . d el . 



Sir.clsar A Scr. Phila 



LAM ELL I BRANCH I ATA . 



(cretaceous - LOWER MARL 3 E D.S 



