8 



VEKTEBRATA OF THE TERTIARY. 



The invertebrate fossils which this group affords are similar to those that are 

 found in the fresh-water portion of the Wasatch Group, some of the species being 



TTpper tarbaniferan* 



^ri^?fr..fi*?r?^*. 



/s 



l Y ii i i ' i i' iyi l'i f T T 



T i ' i ,i'i i !M'i,i' i i:i/(i 



/vi ;i.' ■;i;i; z^:;^^;^^^^ 



Fio. 4. — General Beclion in tho Yniniia diHtrict. White in Annual Report United 

 States Geological Survey Territories, 187G. 



i<1fntical, niid iiidicat*' a jmrcly frcsliwator ooiuHtioii tlironplumt. They are almost 

 wholly iiutllnscaii, and belong to the branchitcroiiH genera Vnw,Vivij>aru«, and Gonio- 



