11 57 Platyeras calantia, Hall Lower Helderberg group. Shaly limestone @ Clarksville, N.Y. 58 Platyceras n. sp. Lower Helderberg grp. Shaly limestone Clarksville, N.Y. 59 Platyceras n. sp. Lower Helderberg grp. Shaly limestone Clarksville, N.Y. 60 Anastrophia vernenili', Hall, Lower Helderberg grp. Clarksville, N.Y. Shaly limestone 61 Anastrophia vernenili'; H.' (a finely plicati specimen) & turn Lower Helderberg grp. Clarksville, N.Y. 62 Anastrophia vernenili', Hall, 'imbricate' Lower Helderberg grp. Clarksville, N.Y. Shaly limestone 63 Strophodonta punctulifera, Conrad Lower Helderberg grp. Clarksville, N.Y. Shaly limestone 64 Strophodonta punctulifera Conrad, Lower Helderberg grp. Clarksville, N.Y. Shaly limestone 65 Strophodonta punctulifera, Conrad. Lower Helderberg grp. Clarksville, N.Y. Shaly limestone 66 Strophodonta variestriata, var. arata, Hall. and Strophodonta punctulifera, Conr. Shaly limestone, Lower Helderberg grp. Clarksville, N.Y. 67 Strophodonta planulata, Hall Lower Helderberg grp. Jerusalem Hill, N.Y. 68 Strophodonta planulata, Hall Lower Helderberg grp., Jerusalem Hill, N.Y. 69 Streptorhynchus radiatus, varietas woodwardi, Hall (intr.) Shaly limestone Lower Helderberg grp. Clarksville, N.Y. 70 Atropa reticularis, Linn. Shaly limestone Lower Helderberg grp. Clarksville, N.Y.