valley we noted two distinct terraces on each side thus: ((drawing in field book)). Did not visit the higher one, but the lower is covered with a cap of boulders, as at Boulder . About 2 miles up the valley on south side the dip in the Mancos shales is a little east of south. There we found in abundance an Ostrea and numerous fragments of a large species of an Inoceramus which I cannot recognize. At that point the north slope was strewn with small Oreohelix (dead shells) and under Amelanchier alnifolia and Cercocarpus parvifolius (mt. mahogany) [ed. not C. parvifolius] we found numbers of live ones, mostly under the former, only two or three under the latter. Collected a lot of them, thinking they may be new. Also found under a plank near a ditch a Succinea and several Agriolimax (small specimens). In the ditches and small overflow sloughs of the river