During the last year the Marwood Beds of Sloley Quarry, near Barnstaple, have yielded some additional specimens of Echinocaris, which have afforded material for the present note. The specimens have all been found in the fine micaceous shaly beds, six to eight feet thick, on the north side of the quarry, below the massive sandstones, and above the shallow-water bed containing plant-remains, rain-prints, worm-tracks, etc. The same shaly beds contain Lingula squamiformis in abundance; other bivalves are less frequent. They have now yielded as many as twelve specimens of Echinocaris.