July 23-1921 Boston, Mass. Worked all day at Mus. of Comp. Zool., Harvard, picking out duplicate brachiopods of the Delany collection of Bohemia. This a very complete and totally different one than orthids and strophomenids. The Ordovician species are not many and all come out of shales, sandstones and limestone like concretions just out of shale. Saw Dalmanella, Plectorthis-like but appear to have a cruralium, Hetutella, something like Orthos elytra, Triplecia slightly lamellose, Plect ambritis, Rafinesquina and Schizocrania. The whole reminds rather of dip. Trenton. Of Silurian saw nothing of the earliest, a Allemandian fauna. Of middle Silurian the common genera are Dalmanella, Phisida orella, Bradyorim, Strophonella, Schizocant ella, Plectambritis,