37 239 Zaphrentis roemeri, Edwards and Harine, Shaly limestone Lower Helderberg group, Clarksville, N. Y. 240 Bellerophon n. sp. Shaly limestone Lower Helderberg group. Clarksville, N. Y. 241 Cyrtina dalmani, Hall. Shaly limestone Lower Helderberg group. Clarksville, N. Y. 242 Favagites n. sp., Hall. Shaly limestone Lower Helderberg group. Clarksville, N. Y. 243 Striatopora cisa, Hall. Shaly limestone Lower Helderberg group. Becrafts Mtn, Hudson, N. Y. 244 Phacops rana, Green (2 spec / enrolled on slab) Hamilton group. 18 Mile Creek, N. Y. 245 Phacops rana Green (enrolled) Hamilton group. 18 Mile Creek, N. Y. 246 Phacops rana, Green (enrolled) Hamilton group. 18 Mile Creek, N. Y. 247 Phacops rana, Green (enrolled) Hamilton group. 18 Mile Creek, N. Y. 248 Pentamerus galeatus, Dalman Shaly limestone Lower Helderberg group. Clarksville, N. Y. 249 Leptaena concava, Hall. Shaly limestone Lower Helderberg group. Clarksville, N. Y. 250 Leptaena concava / Hall Shaly limestone Lower Helderberg group. Clarksville, N. Y. 251 Retzia formosa, Hall. Shaly limestone Lower Helderberg group. Clarksville, N. Y. 252 Discina n. sp.? Shaly limestone Lower Helderberg group. Clarksville, N. Y.