Hermaea Lov. 
Hero Lov. 
Hervia Bergh 
Heterocardia Desh. 
Heteroeyelus Crosse 
Heterodonax Mörch 
Heterostoma Hartm. 
Hexabranchus Ehrbg. 
Hiatella Daud. 
Himella Ad. 
Hinnites Defr. 
!iinterkiemer 
Hippopus Meusch. 
Hirundinella Gray 
Hispidella Lowe 
Histiophorus Pease 
Histrio Pfr. 
Hochstetteria Vel. 
Holospira Alb. 
Homala Mörch 
Homorus Alb. 
Hoplites Austen 
Humphreyia Gray 
Huttonella Pfr. 
Huxleyia Ad. 
Hyalina Fer. 
Hyalosagda Alb. 
Hybocystis Bens. 
Hydatina Schum. 
Hypnophila Bgt 
Hypobranchaea A. Ad. 
Hypotrema Alb. 
Hypselia Lowe 
Hypselostoma Bens. 
Hystricella Lowe 
&berus Montf. 
Ibyeus Heyn. 
Ictis Ald. 
Idalia Leuck 
Idas Jeftr. 
Idesa Ad. 
Idyla v. Vest. 
Infundibularia Pfr, 
Infundibulum Mtf. 
Iphigenia Costa 
Iphigenia Schum. 
lridina Lam. 
Irus Lowe 
Isabellaria Vest. 
Isanda Ad. 
Isocardia Lam. 
Isogonostoma Fitz. 
Isthmia Gray 
Jacra Ad. 
Jagonia Reel. 
Jamaicia C. C. Ad. 
Janella Gray 
Janira Alb. 
‚Janira Schum. 
Janulus Lowe 
Janus Ver. 
Japonia Gould 
Jothia Gray 
Jouannetia Desm. 
Böaliella BIf. 
Kalinga Ald. 
Katelysia Römer 
Kellia Turt. 
Kennerlia Carp. 
Kentrodoris Berg 
Kleinella A. Ad. 
Kraussia Davids. 
Kuzmichia Brus. 
Babiella Pfr. 
Labio Oken 
Labiosa Schm. 
Labyrinthus Beck 
Lacona Gray 
Laevicardium Chemn. 
Lagocheilus Bens. 
Laimodonta Nutt. 
Lajonkairia Desh. 
Lamellidoris Ald. 
Laminella Pfr. 
Laminifera Bttg. 
Lampadia Lowe 
Lamproscapha Swains. 
Lampsilis Raf. 
Laoma Gray 
Laona A. Ad. 
Lasaea Leach. 
Latia Gray 
Latona Schum. 
Lauria Gray 
Lazaria Gray 
Leda Schum. 
Leguminaia Conr. | 
Leguminaia Schum. 
Lehmannia Heyn. 
Leila Gray 
Leiocheila Alb. 
Leiomya Ad. 
Leiopyrga Ad. 
Leiostracus Alb. 
Lemnisceia Lowe 
Lentillaria Schum. 
Leonia Gray 
Lepeta Gray 
Leptachatina Gould 
Leptarionta Crosse 
Leptaxis Lowe 
Leptinaria Beck 
Leptobyrsus Crosse 
Leptolimnea Swains. 
Leptoma Alb. 
Leptomerus Alb. 
Leptomya Ad. 
Lepton Montf 
Leptopoma Pfr. 
Leptosiphon Fisch. 
Leucochila Alb. 
Leucochiloides Pfr. 
Leueochroa Beck 
Leucoma Gray 
Leuconys Ad, 
Leueoptychia Crosse 
Leucorhynchia Crosse 
Leucotaenius Alb. 
Leucotina A. Ad. 
Leukoma Römer 
Levantina Kob. 
Lewisia Chitty 
Lia Alb. 
Liarea Gray 
Libania Bgt. 
Libitina Schum. 
Libratula Pease 
Lieina Gray 
Ligula Reel. 
Liguus Montf. 
Lima Brug. 
Limapontia Forbes 
Limatula S. Wood 
Limax L. 
Limea Brown 
Limieolaria Schum. 
Limnaea Lam. 
Limnophysa Fitz. 
Limnus Montf. 
Limopsis Sassi 
Limosina Cless. 
Lindsleya Chitty 
Lingula Brug. 
Linteria Ad. 
Lioconcha Mörch. 
Liotia Gray 
Liparus Alb. 
Lissoarca Smith 
Litharca Gray 
Lithidion Gray 
Lithodomus Cuy. 
Lithopoma Gray 
Lithotis Blanf. 
Livona Gray 
Lobifera Pease 
Lobiger Krohn 
Lomanotus Ver. 
Lophocereus Krohn 
Loripes Poli 
Lottia Gray 
Lovea Wats. 
Lucapina Gray 
Lucerna Ad. 
Lucidella Swains. 
Lueina Brug. 
Lueinopsis Forbes 
Lunarca Gray 
Lunulicardia Gray 
Lutetina Vel. 
Lutraria Lam. 
Lyonsia Turt. 
Lysinoö Ad. 
Nacalia Ad. 
Machaera Gld 
Machaeroplax Friel. 
Macoma Leach 
Macroceranıus Gldg. 
Macroceras Semp. 
Macrochisma Swains. 
Macrochlamys Bens. 
Maeroeyelis Beck 
Macrocycloides Mart. 
; Moerodontes Swains. 
Maeroptychia Bttg. 
Mactra L. 
Mactrella Gray 
Mactrinula Gray 
Macularia Alb. 
Madrella Ald. 
Magas Sow. 
49 * 
