duction of the large Lepiditina, or milk bed rocks. For the present I think bed may well terminate the Salina. The Tentaculite formation over in- clude beds 3 and 2. Bed 1 goes according my old interpre- tation into the Lower Pentamurus. Bowns estimate of 95-foot talus in the beds from the Tentaculite up to the cystid bed. Just before coming to the shelly cystid zone there is a bed with Favosites and Cladifera. The latter in great abundance. In the cystid zone here are picked up several of the characteristic brachiopods. The Lower Pentamurus zone should come in just beneath the cystid zone but was not able to find it in close association with this zone. However Mr. Darby found the bed on the hills west of the Brimbleton road in the