3 mi. NW of Court house at Hamilton, NW branch of Two mile creek, along by road from 704 N to 869. Hole Olympus stone moderately slimy does not occur between 727 and 730, the remainder out well exposed. Dinethis ritoma, single good specimen at 760. This is lower than supposed, but the place may have displaced a slight distance. Numerous shallow exposures along the roadside this level. 3 mi. W of North of Hamilton, 1/2 mi West of 860 in section 15, the same faded cement out at the base of the Waynesville bed, as along Salmon Run is found. A good Oreuthis ritoma in a lime but mineralized fossil the interior occurred 20 ft lower. According to this the Dineths ritoma range should be placed here at about 780 ft. Acidaspis onealli. Thrax with 10 segments, The pleurae with two spines, Posterior spine of posterior segment = 4 mm. Anterior spine of first in segment = scarcely one mm. Posterior spine of 5th segment = 3 mm. middle lobe of thora near anterior end = 4 mm. lateral lobe 4 mm. mean middle length of body, not counting the spirals. Oxydium with 2 spines 6 mm long, 4 intermediate spines 1/3 mm long, and at least 3 lateral spines of which the inner two are about 1/3 mm long. Head and spines of oxydium rather distinctly scarred. A second oxydium has the interne- dicti spines scarcely 1/2 in long. Slight difference. Thigh bank of Four mile Tallawudy creek. 2-2 mi. N of Oxford, west end part of section 11, found by Dr. Stephen R Williams, in lava part of Waynesville bed,