Cambrian Sec tion, Hockbridge Co. ,_Va. 
Lower Camb rian lo cal ities.-About 5 miles south of the 
Natural Bridge, on the south side of the .Jaynes River, the 
Olenellus fauna occurs in sandstones and calcareous beds just 
above the scolithus quartzite. It also occurs in a band of 
shales at the summit of the purple shales above the scolithus 
quartzite in a cut of the Shenandoah Valley railroad, a short 
distance ^est of the suburbs of Buena Vista. The band of shale 
in which the heads of Olenellus were found is a short distance 
below the base of the massive limestone. 
Middl e C ambrian locali ties .-"-The only locality where the 
Middle Cambrian fossils were found is on the roadside about 1 
mile northwest of the crest of the southern portion of Sailings 
Mountain, where the road forks, one branch leading to natural 
Bridge, and the other to Buffalo Borge. 
Large species of Bathyuriseus occur in a thin bed of 
greenish shale interbedded in the arenaceous and magnesian 
limestones. 
Upper Cam brian localities.---The only locality is on the 
north side of Buffalo Creek, about 2 miles southeast of Buffalo 
Mills. At this point Lingulepis acum inata occurs in a shaly 
limestone that is interbedded in the massive, more or less 
arenaceous and magnesian limestones. 
