These next specimens are of the bryozoan Lichenalia stellata that I picked up along the shoreline of Lake Erie near Lake View, NY. They are very distinctive with a stippled surface that represents individual zooids (the space where an individual bryozoan animal lived). L. stellata appears to have been an encrusting type bryozoan and seemed to form layers as the substrate it lived upon was tossed during storm events and the colony regrew on newly exposed surfaces.
Specimen #2 is covering a Favosites sp. colony.
Both specimens were found in the Wanakah shale, Ludlowville formation which is Devonian in age (Givetian stage). I've found a similar genus in the Hungry Hollow member of the Widder formation near Arkona.