109 Federal Harbor 6.41.7 6.41.7 A - A quarter of a mile west of the south tip of Federal Harbor and west of the road, on the line between 6.41 & 6.51. Stratigraphically about 600 ft. or more below 6.41.8 F. Camarotoecia abundant Chonetes denysi abundant Dalmanella common Grammysia cingulata var. occasional Actinopterella 2 or 3 spp. common Pteronitella retroflexa occasional Goniophora (2 spp.) ", Cypricardinia "platyphyllus" ", Ctenodonta (2 spp.) ", various Camellibranchia common Myrchisonia 2 or 3 spp. ", Corbulites rare Trilobites (Dalmanites or Calymene) rare.