In the afternoon examined the basal Silurian beds back of Manitowaning for about 3/4 mile to the north and about the same distance to the south. Contact with the Richmond cannot be seen here. I rather think this may be about 20 feet more of Richmond above what we saw this morning before the Silurian begins. The "Clinton" makes an exposure—perpendic- ular—here from 25 to justly 50 feet. It consist of thin bedded grey to yellowish fine grained clor- mite without shale partings. All of the fossils are silicious pseudomorphs and as a rule are amy form. In the thin bedded sandstone one gets Farnsite with small corallites, Acervularia Eridiphyllum, Helicilites, Amphitheca plano- convexa (not hemispherica as reported by Dale), Olmonella elephantula, Phisidomella hybida, Orthus new mania, Johnchestella rev nearly a Whitfieldella Orthus davidsoni, Q. flabellulum, Platystrophia fignata, In many places the iron bedded character of these basal Clinton beds is replaced by reef limestone that have a central thickness of from 5 to at least 10 feet. One reef is made up