Corals are the predominating fossils, Astro. me?rina most abundant sometimes in masses of To 30 inches in diameter. A large celled Favos. site also forms quite large and in one place makes a reef but draws none of the other ani- mals associated on a true reef. Eridophyllum is probably the commonest true coral and makes columnus beds often several feet thick, Helio- lites the most widely distributed throughout the bed which is also true of Stromatopora. Haly. site quite common at times and in places may be nearly 2 feet in diameter. Cladophora generally rare. Cup corals practically absent. As a rule the beds are a grey-green hard shale with zones of thin bandel areas nears limestone. The shales are sometimes variegated with red and then some zones either of shale or limestone may be a dull brick red. In one place saw the Conarotwo lying in fairly distinct beds upon the nearly vertical Silurian beds. An angular unconformity