The nonavian megafauna of the main fossiliferous layer (Basal Hornerstown Formation), at the Inversand Company marl pit, Sewell, Gloucester County, New Jersey is listed below. Also found in the deposits were numerous coprolites of sharks and crocodilians, some amber, phosphatized wood, and a few seeds. Voucher specimens are in the collections of the New Jersey State Museum, Academy of Natural Sciences of Philadelphia, and Yale University (Princeton University collections). Brachiopoda _Terebratulina atlantica_ (Morton) Gastropoda _Gyrodes abyssinus_ (Morton) _Acteon cretacea_ Gabb _Anchura abrupta_ Conrad _Turbinella parva_ Gabb _Lunatia halli_ Gabb _Pyropsis trochiformis_ (Tuomey) _Volutoderma ovata_ Whitfield _Turbinella subconica_ Gabb _Turritella vertebroides_ Morton Pelecypoda _Cardium tenuistriatum_ Whitfield _Glycymeris mortoni_ (Conrad) _Gryphaea convexa_ (Say) _Gervilliopsis ensiformis_ (Conrad) _Panopea decisa_ Conrad _Veniella conradi_ Morton _Crassatella vadosa_ Morton _Cucullaea vulgaris_ Morton _Lithophaga ripleyana_ Gabb _Xylophagella irregularis_ (Gabb) _Nuculana stephensoni_ Richards _Etea delawarensis_ (Gabb) Nautiloidea _Eutrephoceras dekayi_ (Morton) Ammonoidea _Baculites ovatus_ Say _Sphenodiscus lobatus_ (Tuomey) _Pachydiscus_ (_Neodesmoceras_) sp. Crustacea cf. _Hoploparia_ sp. Chondrichthyes _Lamma appendiculata_ (Agassiz) _Odontaspis cuspidata_ (Agassiz) _Squalicorax pristodontus_ (Morton) _Hexanchus_ sp. _Edaphodon stenobryus_ (Cope) _Edaphodon mirificus_ Leidy _Ischyodus_ cf. _I. thurmanni_ Pictet and Campiche _Squatina_ sp. _Myliobatis_ cf. _M. leidyi_ Hay _Ischyrhiza mira_ Leidy _Rhinoptera_ sp. cf. _Rhombodus levis_ Cappetta and Case Osteichthyes _Enchodus_ cf. _E. ferox_ Leidy _Enchodus_ cf. _E. serrulalus_ Fowler _Paralbula casei_ Estes Chelonia _Adocus beatus_ Leidy _Osteopygis emarginatus_ Cope _Taphrospys sulcatus_ (Leidy) _Dollochelys atlantica_ (Zangerl) Crocodilia cf. _Procaimanoidea_ sp. _Hyposaurus rogersii_ Owen _Thoracosaurus_ sp. _Bottosaurus harlani_ Meyer _Diplocynodon_ sp. Lacertilia _Mosasaurus_ sp. _Plioplatecarpus_ sp. Literature Cited Baird, Donald 1967. Age of Fossil Birds from the Greensands of New Jersey. _Auk_, 84:260-262. Brodkorb, Pierce 1963a. Birds from the Upper Cretaceous of Wyoming. _Proceedings of the XIIIth International Ornithological Congress_, pages 55-70, 10 figures. 1963b. Catalogue of Fossil Birds, Part 1 (Archaeopterygiformes through Ardeiformes). _Bulletin of the Florida Slate Museum_, _Biological Sciences_, 7(4):179-293. 1967. Catalogue of Fossil Birds, Part 3 (Ralliformes, Ichthyornithiformes, Charadriiformes). _Bulletin of the Florida Slate Museum_, _Biological Sciences_, 11(3):99-220.