Actaeon cretacea Gabb, 1861 † accepted as Acteon cretacea Gabb, 1861 † (original description)
Arca altirostris Gabb, 1861 † accepted as Arca quindecemradiata Gabb, 1860 † (original description)
Architectonica abbottii Gabb, 1861 † accepted as Pleurotomaria crotaloides (S. G. Morton, 1834) † (original description)
Ctenoides denticulicosta Gabb, 1861 † accepted as Lima denticulicosta (Gabb, 1861) † (original description)
Cucullaea neglecta Gabb, 1861 † accepted as Idonearca neglecta (Gabb, 1861) † (original description)
Cucullaea transversa Gabb, 1861 † accepted as Cucullaea gabbi C. W. Johnson, 1905 † (original description)
Fasciolaria slackii Gabb, 1861 † accepted as Bellifusus slackii (Gabb, 1861) † (original description)
Gryphaea thirsae Gabb, 1861 † accepted as Odontogryphaea thiersae (Gabb, 1861) † (original description)
Gyrodes obtusivolva Gabb, 1861 † accepted as Polinices altispira (Gabb, 1861) † (original description)
Gyrodes spillmanii Gabb, 1861 † (original description)
Natica infracarinata Gabb, 1861 † accepted as Gyrodes supraplicatus (Conrad, 1858) † (original description)
Ostrea mortoni Gabb, 1861 † accepted as Hyotissa vicksburgensis mortoni (Gabb, 1861) † (original description)
Ostrea pandaeformis Gabb, 1861 † accepted as Pycnodonte trigonalis (Conrad, 1854) † (original description)
Trochus mortonii Gabb, 1861 † (original description)
Turbinopsis depressa Gabb, 1861 † accepted as Turbinopsis hilgardi Conrad, 1860 † (original description)
Voluta kanei Gabb, 1861 † accepted as Piestochilus kanei (Gabb, 1861) † (original description)
Voluta mucronata Gabb, 1861 † accepted as Odontofusus mucronatus (Gabb, 1861) † (original description)