38 
Gastrochaena, 31 
Gastrodonta, 5 
Gemma, 28 
Gillia, 16 
Glycymeris, 20 « 
Goniobasis, 16 
Haminea, 2 
Helicella, 6 
Helicodiscus, 5 
Helix, 6 
Ilyanassa, 11 
Labiosa, 31 
Lampsilis, 22 
Leda, 19 
Lepton, 27 
Lima, 21 
Limax, 5 
Limnaea, 2 
Liomesus, 11 
Liotia, 18 
Lithophaga, 22 
Litiopa, 15 
Litorina, 15 
Loligo, 1 
Lucina, 26 
Lyonsia, 32 
Macoma, 29 
Macrocallista, 28 
Mactra, 30 
Maculopeplum, 10 
Mangilia, 8 
Margarita, 18 
Marginella, 9 
Martesia, 32 
Medionidus, 23 
Melampus, 2 
Mesodesma, 31 
Metis, 29 
Mitra, 10 
Modiolaria, 22 
INDEX 
Modiolus, 22 
Mulinia, 31 
Murex, 12 
Musculium, 25 
Mya, 31 
Mytilus, 21 
Natica, 17 
Nucula, 19 
Odostomia, 14 
Oliva, 9 
Olivella, 9 
Omphalina, 4 
Opeas, 6 
Ostrea, 20 
Paramya, 31 
Pecten, 21 
Pedalion, 20 
| Periploma, 32 
| Petricola, 28 
Phacoides, 27 
Philomycus, 5 
Pholas, 31 
Physa, 3 
Pisania, 11 
Pisidium, 26 
| Placunanomia, 21 
Planorbis, 3 
Pleurocera, 16 
| Plicatula, 21 
Pododesmus, 21 
Polygyra, 6 
Polynices, 17 
Polypus, 1 
Psammosolen, 30 
Pteria, 20 
| Pupoides, 4 
| Purpura, 12 
| Pyramidella, 13 
| Pyramidula, 5 
Pyrula, 14 
