Aclis microsculpta Gabb, 1881 † (original description)
Adeorbis infracarinatus Gabb, 1881 † accepted as Solariorbis infracarinatus (Gabb, 1881) (original description)
Adeorbis simplex Gabb, 1881 † (original description)
Astarte meridionalis Gabb, 1881 † (original description)
Atlanta ammonitiformis Gabb, 1881 † (original description)
Caecum crassicostum Gabb, 1881 † accepted as Caecum floridanum W. Stimpson, 1851 (original description)
Calliostoma guppyana Gabb, 1881 † (original description)
Cardita conradiana Gabb, 1881 † (original description)
Cardium (Trachycardium) callopleurum Gabb, 1881 † (original description)
Cardium (Trachycardium) declive Gabb, 1881 † accepted as Acrosterigma declive (Gabb, 1881) † (original description)
Caryatis guppyana Gabb, 1881 † (original description)
Caryatis lordlyi Gabb, 1881 † (original description)
Cerithium biseriatum Gabb, 1881 † (original description)
Cerithium caribbaeum Gabb, 1881 accepted as Cerithiopsis caribbaea (Gabb, 1881) (original description)
Cerithium collinsii Gabb, 1881 † accepted as Phosinella collinsii (Gabb, 1881) † (original description)
Cerithium limonensis Gabb, 1881 † (original description)
Cerithium lordlyi Gabb, 1881 † (original description)
Cerithium moenensis Gabb, 1881 † accepted as Cerithium guinaicum R. A. Philippi, 1849 (original description)
Cerithium triseriale Gabb, 1881 † accepted as Bittiolum varium (L. Pfeiffer, 1840) (original description)
Crenella (Modiolaria) translucida Gabb, 1881 † accepted as Musculus lateralis (Say, 1822) (original description)
Donax moenensis Gabb, 1881 † (original description)
Drillia moenensis Gabb, 1881 † (original description)
Hipponyx crepidula Gabb, 1881 † (original description)
Janira laevigata Gabb, 1881 † accepted as Euvola limonensis (Dall, 1898) † (original description)
Lithophaga incurva Gabb, 1881 † accepted as Leiosolenus aristatus (Dillwyn, 1817) (original description)
Mangelia lata Gabb, 1881 † (original description)
Mangelia subcylindrica Gabb, 1881 † (original description)
Marginella ovuliformis Gabb, 1881 † (original description)
Meretrix discoidea Gabb, 1881 † (original description)
Nassa caribaea Gabb, 1881 † (original description)
Nucula limonensis Gabb, 1881 † (original description)
Nucula moenensis Gabb, 1881 † (original description)
Parkeria Gabb, 1881 † (original description)
Parkeria inconspicua Gabb, 1881 † (original description)
Psephis cancellata Gabb, 1881 † (original description)
Siliquaria sculpturata Gabb, 1881 † accepted as Tenagodus squamatus (Blainville, 1827) (original description)
Strombina exilis Gabb, 1873 † (redescription)
Strombina limonensis Gabb, 1881 † (original description)
Styliola bicostata Gabb, 1881 † accepted as Vaginella bicostata (Gabb, 1881) † (original description)
Tagelus lineatus Gabb, 1881 † (original description)
Tellina (Peronaea) appressa Gabb, 1881 † (original description)
Vitrinella crassicosta Gabb, 1881 † (original description)
Vitrinella obliquestriata Gabb, 1881 † (original description)
Vitrinella truncata Gabb, 1881 † accepted as Solariorbis truncatus (Gabb, 1881) (original description)

Costa Rica for Aclis microsculpta Gabb, 1881 † 
Costa Rica for Adeorbis infracarinatus Gabb, 1881 † 
Costa Rica for Adeorbis simplex Gabb, 1881 † 
Costa Rica for Astarte meridionalis Gabb, 1881 † 
Costa Rica for Atlanta ammonitiformis Gabb, 1881 † 
Costa Rica for Caecum crassicostum Gabb, 1881 † 
Costa Rica for Calliostoma guppyana Gabb, 1881 † 
Costa Rica for Cardita conradiana Gabb, 1881 † 
Costa Rica for Cardium (Trachycardium) callopleurum Gabb, 1881 † 
Costa Rica for Cardium (Trachycardium) declive Gabb, 1881 † 
Costa Rica for Caryatis guppyana Gabb, 1881 † 
Costa Rica for Caryatis lordlyi Gabb, 1881 † 
Costa Rica for Cerithium biseriatum Gabb, 1881 † 
Costa Rica for Cerithium caribbaeum Gabb, 1881 
Costa Rica for Cerithium collinsii Gabb, 1881 † 
Costa Rica for Cerithium limonensis Gabb, 1881 † 
Costa Rica for Cerithium lordlyi Gabb, 1881 † 
Costa Rica for Cerithium moenensis Gabb, 1881 † 
Costa Rica for Cerithium triseriale Gabb, 1881 † 
Costa Rica for Crenella (Modiolaria) translucida Gabb, 1881 † 
Costa Rica for Donax moenensis Gabb, 1881 † 
Costa Rica for Drillia moenensis Gabb, 1881 † 
Costa Rica for Hipponyx crepidula Gabb, 1881 † 
Costa Rica for Janira laevigata Gabb, 1881 † 
Costa Rica for Lithophaga incurva Gabb, 1881 † 
Costa Rica for Mangelia lata Gabb, 1881 † 
Costa Rica for Mangelia subcylindrica Gabb, 1881 † 
Costa Rica for Marginella ovuliformis Gabb, 1881 † 
Costa Rica for Meretrix discoidea Gabb, 1881 † 
Costa Rica for Nassa caribaea Gabb, 1881 † 
Costa Rica for Nucula limonensis Gabb, 1881 † 
Costa Rica for Nucula moenensis Gabb, 1881 † 
Costa Rica for Parkeria inconspicua Gabb, 1881 † 
Costa Rica for Psephis cancellata Gabb, 1881 † 
Costa Rica for Siliquaria sculpturata Gabb, 1881 † 
Costa Rica for Strombina limonensis Gabb, 1881 † 
Costa Rica for Tagelus lineatus Gabb, 1881 † 
Costa Rica for Tellina (Peronaea) appressa Gabb, 1881 † 
Costa Rica for Vitrinella crassicosta Gabb, 1881 † 
Costa Rica for Vitrinella obliquestriata Gabb, 1881 † 
Costa Rica for Vitrinella truncata Gabb, 1881 †