Diatoms. 1558 Orthocenta heeli. This is just the same species as the I. bipartita. 1552 Hederella. This should be looked into 1576-7 Orthothela here marked Orthodata bipartita. 1557 A small globula Farrisii meets or ident with the coralline of 1557 This is a small slit marked Diatomea and has Pi lamellosa. I. oncidestr. The former in great abundance. The Diatomaceous fossils as here shown are not stratigraphically the separator from the corallines. The latter is not the Ordovician but is clearly the last horizon in the Mid. Lown Permian. The Upper Permian collection is fair and better than the Ord. solely, howerer it is not what it should be to be fair representative collection.