are also some sandstones and arenaceous limestones. The entire series is at least 300 feet thick, and containing the higher fossils occur in it almost throughout, but more commonly at the top beneath the dark slates. The specimens are all from due to the fact on whom all of these beds have under- gone. Partially the commonest fossil is Torpidus-leptus caesarius [see if near the European Chengian form] and the second Spirifer avarius. Dav or Rensselaria and Bell think he saw me Hipparynx jarginus. Spirifers are common. The Shifferdotes are present in at least two forms but saw no Leptaena schmidlii. A very large Hymenopterus is often seen in peg- matite. Dav or Leptoceroidis stellata. Conoid shells are not rare. The Heldbergian is a series of living sandstones, either little sandstones, arenaceous slates and micaceous slates. In the main the Held. is sandy. The thickness may be as much as 500 feet. The held is marked at the top