formis [?], Corbicula, Ostrea, and with no Cardium or gastropods. The first s.s. does not make a ridge on the W side of the gap. Above the next s.s. is a coal vein which has been worked somewhat on both sides of gap. This is overlaid by clay shales, then sandy shales. About 100 ft. above this is a series of burned s.s. and clays which I estimated to be 200 ft. thick, probably metamorphosed by burning of coal veins. This is overlaid by a massive s.s. like the Laramie, which in turn is overlaid by alternating s.s. etc. as below. I notice two more coal openings above this on W side of gap, the uppermost but little below the upper ridge making sandstone ledge. All along the sandy slope we found dead Oreohelix cooperi, but saw no live ones, though, for
