"Michigan", "Thunder Bay Region.", Highest beds on Thunder Bay are in the south side of Partridge Point or on Squam Bay. Here the Senese also outcrops. The highest Hamilton beds have no fossils but the shale beds below on the north side of the point are free of good fossils, aboundig in Bryozoa, Crinoidea and Brachiopoda. Stone Point north of Partridge Point and south of Alpena has lower beds pro- jecting but a few feet above the lake and are free of fossils. Thunder Bay River. Along the south bank in Alpena in section 28 and 20 the north are exposed. The highest beds have but few fossils, but the archelaus limestone abounds in them. Exposure is to 75 feet. North Alpena is built on a nearly level holding many fossils. More exposure can be seen on the side of the first lake terrace. Continuing farther are quarries carbon.