Actaeon aciculatum Cossmann, 1889 † accepted as Crenilabium aciculatum (Cossmann, 1889) † (original description)
Actaeon gardneri Cossmann, 1889 † accepted as Acteon gardneri (Cossmann, 1889) † (original description)
Actaeon gilberti Cossmann, 1889 † accepted as Acteon gilberti (Cossmann, 1889) † (original description)
Acteon (Semiactaeon) Cossmann, 1889 † represented as Acteon Montfort, 1810 (original description)
Alexia boissyi Cossmann, 1889 † accepted as Ovatella (Myosotella) boissyi (Cossmann, 1889) † accepted as Myosotella boissyi (Cossmann, 1889) † (original description)
Alocaxis Cossmann, 1889 † (original description)
Amblyacrum Cossmann, 1889 † (original description)
Amblyacrum bernayi Cossmann, 1889 † (original description)
Ancilla arenaria Cossmann, 1889 † accepted as Amalda arenaria (Cossmann, 1889) † (original description)
Ancylus (Velletia) arenarius Cossmann, 1889 † accepted as Acroloxus arenarius (Cossmann, 1889) † (original description)
Ancylus matheroni var. lemoinei Cossmann, 1889 † accepted as Acroloxus matheroni lemoinei (Cossmann, 1889) † (original description)
Argobuccinum boutillieri Cossmann, 1889 † accepted as Daphnellopsis boutillieri (Cossmann, 1889) † (original description)
Auricula (Pythiopsis) cimex Deshayes, 1863 † accepted as Pythiopsis cimex (Deshayes, 1863) † (basis of record)
Auricula (Pythiopsis) cimex var. flexilamella Cossmann, 1889 † accepted as Pythiopsis cimex flexilamella (Cossmann, 1889) † (original description)
Auricula (Semiauricula) Cossmann, 1889 † accepted as Semiauricula Cossmann, 1889 † (original description)
Auricula auversiensis Cossmann, 1889 † accepted as Pythiopsis auversiensis (Cossmann, 1889) † (original description)
Bela crassicostata Cossmann, 1889 † (original description)
Bela entomella Cossmann, 1889 † accepted as Buchozia entomella (Cossmann, 1889) † (original description)
Bela lamellicostata Cossmann, 1889 † (original description)
Bittium elachistum Cossmann, 1889 † (original description)
Borsonia chevallieri Cossmann, 1889 † accepted as Cordieria chevallieri (Cossmann, 1889) † (original description)
Buccinofusus bezanconi Cossmann, 1889 † accepted as Wrigleya bezanconi (Cossmann, 1889) † (original description)
Bulimulus lemoinei Cossmann, 1889 † accepted as Azeca lemoinei (Cossmann, 1889) † (original description)
Cancellaria bernayi Cossmann, 1889 † accepted as Admetula bernayi (Cossmann, 1889) † (original description)
Cancellaria boutillieri Cossmann, 1889 † accepted as Unitas boutillieri (Cossmann, 1889) † (original description)
Cancellaria chaussyense Cossmann, 1889 † accepted as Coptostoma chaussyense (Cossmann, 1889) † (original description)
Cancellaria infraeocaenica Cossmann, 1889 † accepted as Unitas infraeocaenica (Cossmann, 1889) † (original description)
Cancellaria sinuosa Cossmann, 1889 † accepted as Admetula sinuosa (Cossmann, 1889) † (original description)
Cancellaria sphaericula Cossmann, 1889 † accepted as Admetula sphaericula (Cossmann, 1889) † (original description)
Carychium hypermeces Cossmann, 1889 † (original description)
Cassis chevallieri Cossmann, 1889 † (original description)
Cerithium bernayi Cossmann, 1889 † accepted as Hemicerithium bernayi (Cossmann, 1889) † (original description)
Cerithium chevallieri Cossmann, 1889 † accepted as Ptychocerithium chevallieri (Cossmann, 1889) † (original description)
Cerithium edulcoratum Cossmann, 1889 † accepted as Ptychocerithium edulcoratum (Cossmann, 1889) † (original description)
Cerithium gardneri Cossmann, 1889 † accepted as Hemicerithium gardneri (Cossmann, 1889) † (original description)
Cerithium polysarcum Cossmann, 1889 † accepted as Tenuicerithium polysarcum (Cossmann, 1889) † (original description)
Cerithium synarthrotum Cossmann, 1889 † accepted as Bezanconia synarthrota (Cossmann, 1889) † (original description)
Cerithium valdancurtense Cossmann, 1889 † accepted as Terebralia valdancurtensis (Cossmann, 1889) † (original description)
Clausilia (Agathylla) bernayi Cossmann, 1889 † accepted as Laminifera bernayi (Cossmann, 1889) † (original description)
Clausilia bourdoti Cossmann, 1889 † accepted as Cylindrellina bourdoti (Cossmann, 1889) † (original description)
Clausilia houdasi Cossmann, 1889 † accepted as Laminifera houdasi (Cossmann, 1889) † (original description)
Cryptoconus baudoni Cossmann, 1889 † (original description)
Cylichna (Acrostemma) Cossmann, 1889 † represented as Cylichna Lovén, 1846 (original description)
Cylichna sectifera Cossmann, 1889 † (original description)
Drillia bouryi Cossmann, 1889 † accepted as Crassispira bouryi (Cossmann, 1889) † (original description)
Drillia grignonensis Cossmann, 1889 † accepted as Crassispira grignonensis (Cossmann, 1889) † (original description)
Drillia hypermeces Cossmann, 1889 † accepted as Crassispira hypermeces (Cossmann, 1889) † (original description)
Drillia mausseneti Cossmann, 1889 † accepted as Crassispira mausseneti (Cossmann, 1889) † (original description)
Drillia obliquata Cossmann, 1889 † accepted as Crassispira obliquata (Cossmann, 1889) † (original description)
Drillia oxyacrum Cossmann, 1889 † accepted as Crassispira oxyacrum (Cossmann, 1889) † (original description)
Drillia pantrachia Cossmann, 1889 † accepted as Crassispira pantrachia (Cossmann, 1889) † (original description)
Drillia propeangulosa Cossmann, 1889 † accepted as Crassispira propeangulosa (Cossmann, 1889) † (original description)
Ectinochilus Cossmann, 1889 † (original description)
Fastigiella (Mellevillia) Cossmann, 1889 † represented as Fastigiella Reeve, 1848 (original description)
Gadinia hipponyxoides Cossmann, 1889 † accepted as Trimusculus hipponyxoides (Cossmann, 1889) † (original description)
Genea chaussyensis Cossmann, 1889 † accepted as Pseudoandonia chaussyensis (Cossmann, 1889) † (original description)
Helix (Acanthinula) bouryi Cossmann, 1889 † accepted as Acanthinula stueri (Cossmann, 1892) † (original description)
Helix (Grandipatula) Cossmann, 1889 † accepted as Grandipatula Cossmann, 1889 † (original description)
Helix (Sagdellina) Cossmann, 1889 † accepted as Sagdellina Cossmann, 1889 † (original description)
Helix (Sagdellina) laubrierei Cossmann, 1889 † accepted as Sagdellina laubrierei (Cossmann, 1889) † (original description)
Homotoma dimeres Cossmann, 1889 † accepted as Pleurotomella dimeres (Cossmann, 1889) † (original description)
Ischnodactylus plateaui Cossmann, 1889 † accepted as Araeodactylus plateaui (Cossmann, 1889) † (original description)
Laeocochlis chevallieri Cossmann, 1889 † (original description)
Laeocochlis loustauae Cossmann, 1889 † (original description)
Laevibuccinum brevispiratum Cossmann, 1889 † accepted as Euryochetus brevispiratus (Cossmann, 1889) † (original description)
Laevibuccinum spiratum Cossmann, 1889 † accepted as Euryochetus spiratus (Cossmann, 1889) † (original description)
Latirofusus Cossmann, 1889 † accepted as Dolicholatirus Bellardi, 1884 (original description)
Limnaea brachystoma Cossmann, 1889 † accepted as Galba brachystoma (Cossmann, 1889) † (original description)
Lovenella bernayi Cossmann, 1889 † accepted as Cerithiopsis bernayi (Cossmann, 1889) † (original description)
Lovenella diozodes Cossmann, 1889 † accepted as Cerithiopsis diozodes (Cossmann, 1889) † (original description)
Mangilia labratula Cossmann, 1889 † accepted as Mangelia labratula (Cossmann, 1889) † (original description)
Marginella acutispira Cossmann, 1889 † accepted as Gibberula acutispira (Cossmann, 1889) † (original description)
Marginella bouryi Cossmann, 1889 † accepted as Volvarina bouryi (Cossmann, 1889) † (original description)
Marginella chastaingi Cossmann, 1889 † accepted as Dentimargo chastaingi (Cossmann, 1889) † (original description)
Marginella entomella Cossmann, 1889 † accepted as Stazzania entomella (Cossmann, 1889) † (original description)
Marginella frederici Cossmann, 1889 † accepted as Gibberula frederici (Cossmann, 1889) † (original description)
Marginella goossensi Cossmann, 1889 † accepted as Persicula goossensi (Cossmann, 1889) † (original description)
Marginella spirata Cossmann, 1889 † accepted as Gibberula spirata (Cossmann, 1889) † (original description)
Mayeria bonneti Cossmann, 1889 † accepted as Surculites bonneti (Cossmann, 1889) † (original description)
Melongena laubrierei Cossmann, 1889 † accepted as Wrigleya laubrierei (Cossmann, 1889) † (original description)
Mitra bernayi Cossmann, 1889 † accepted as Mitreola bernayi (Cossmann, 1889) † (original description)
Mitra bouryi Cossmann, 1889 † accepted as Vexillum bouryi (Cossmann, 1889) † (original description)
Mitra boutillieri Cossmann, 1889 † accepted as Vexillum boutillieri (Cossmann, 1889) † (original description)
Morio eurychilus Cossmann, 1889 † accepted as Galeodea eurychilus (Cossmann, 1889) † (original description)
Olivella goniata Cossmann, 1889 † accepted as Pseudolivella goniata (Cossmann, 1889) † (original description)
Orthochetus Cossmann, 1889 † (original description)
Planaxis (Orthochilus) Cossmann, 1889 † accepted as Orthochilus Cossmann, 1889 † (original description)
Planaxis denudatus Cossmann, 1889 † accepted as Leioplanaxis denudatus (Cossmann, 1889) † (original description)
Planorbis (Anisus) herouvalensis Cossmann, 1889 † accepted as Anomalorbina herouvalensis (Cossmann, 1889) † (original description)
Planorbis (Helisoma) altivolvis Cossmann, 1889 † accepted as Biomphalaria altivolvis (Cossmann, 1889) † (original description)
Plesiocerithium Cossmann, 1889 † (original description)
Pleurotoma contabulata Cossmann, 1889 † accepted as Crassispira contabulata (Cossmann, 1889) † (original description)
Pleurotoma infraeocaenica Cossmann, 1889 † accepted as Fusiturris infraeocaenica (Cossmann, 1889) † (original description)
Pleurotoma laubrierei Cossmann, 1889 † accepted as Fusiturris laubrierei (Cossmann, 1889) † (original description)
Pleurotoma mellevillei Cossmann, 1889 † accepted as Gemmula mellevillei (Cossmann, 1889) † (original description)
Pleurotoma metableta Cossmann, 1889 † accepted as Gemmula metableta (Cossmann, 1889) † (original description)
Pleurotoma oligocolpa Cossmann, 1889 † accepted as Eopleurotoma oligocolpa (Cossmann, 1889) † (original description)
Pleurotoma plateaui Cossmann, 1889 † accepted as Turricula plateaui (Cossmann, 1889) † (original description)
Pleurotoma sulcatina Cossmann, 1889 † accepted as Eopleurotoma sulcatina (Cossmann, 1889) † (original description)
Potamides (Tylochilus) Cossmann, 1889 † accepted as Granulolabium Cossmann, 1889 † (original description)