9. Calybeats Spring, 1/2 mi. above Sulphur Spring, on East side of Horse creek. A short dist. once down the river from the spring are 15 ft. of white limestone = top of Silu- rion. This is overlaid by at least 60 ft. of Lower Helderberg, con- taining large round crinoid- al bodies through their whole extent apparently. Small fossils (Lower Helderberg?) occur just above the Silurian limo- stone. 10. S.E. of Mr. Cal. Blomtis Home, 2 miles above Calybeate spring, along Horse creek. The top of the Lower Helderberg contains the large round Crinoidal bodies. There is a trace of Black shale, nor well exposed, and the Marne gy is abundantly exposed. Cerro Gordo - Saltillo. 11. Cave Spring, on road from Sa- vanna to Cerro Gordo, 1/4 mi. E. of Cerro Gordo. A little whitish clay, resting on 35 ft. red rock, clayey at least. 28 ft. white limestone below. 12. Cerro Gordo. Brown sand and gravel (chiefly the latter) = Coffee sand? 8 1/2 ft. very fossiliferous clay with limestone shivers. 5 1/2 ft. freeb. limed, very fossilif. 3 ft 9 in. Clayey limest. " " 2 ft 4 in. mud clay 4 in. limestone {Merriz cas- 3 1/3 ft. white clay to origin. fossilifera} 2 ft. massive indurated clay bed as at Rize Mill 26 ft. red rock, becoming more clay at top, but turning to red and fairly solid near whitish limestone below. 32 1/2 feet white rock 10 feet not exposed on account of high water. 13. Saltillo 1 mile S. of town, on Miles creek, at site of old mill, 1/4 mi. West of river is abundant Ordovician ce-