58 



INDEX. 



Gillia, 4, 12, 26, 39, 51, 55 

 Gillia altilis, 27, 28, 61 

 Gnathocion, 49 



Heleohia, 47 

 HeJicid:v, 34 

 Helix electrina, 30 

 Histrionella, 34 

 Histrioiiella pomatiopsidis, 35 

 Hydrobia, 1, 2, 4, 5, 38, 43, 55 

 Hjdrobia ulvje, 42, 43 

 Hydrobiinae, 4, 12, 38 

 Uydrobius, (5 



Leachia, 4, 17, 44, 45 



Leptoxis, 1, 20, 24, 26 



LithocI tjpus, 53 



Lithogiyphus, 2, 4, 6, 20, 36, 38, 39, 

 53, 55 



Lithogiyphus fuscus, 53 



lapidum, 53, 54 

 naticoides, 53 

 peristomatus, 53, 54 



Lithoglypter, 53 



Littoiinella, 4, 20, 41, 42, 43, 45, 55 



Littorinella minuta, 6, 20, 41, 42, 43, 

 44 

 ventrosa, 42 



Littorinida, 4, 43 



Littorinkl^, 1, 2, 3, 38 



Loligopsis, 45 



Lyo gyrus, 17 



Melunia, 1, 8, 41 

 Melania altilis, 23, 26, 51 



corolla, 50 



exicjua, 49 



helvetica, 47 



integra, 23, 28, 51 



isogona, 11, 22, 52 

 Melnniidat, 2, 11, 25, 41 

 Melantho, 24 

 Microtia, 4, 19, 44 

 Muduliw, 11 



Nematura, 4, 38, 40 

 Nematiira deltas, 40 



Onoba, 1, 4 



Palndestrina, 2, 4, 39, 43, 45, 46, 55 



Paludestrina andicola, 47 



Auberiaua, 46, 47 

 culniinea, 46, 47 

 Cuiiiingiana, 46 

 lajiidiim, 54 

 Parchappii, 46 

 perislomata, 54 



Paludina, 1, 5, 7, 20, 24 

 Paludiua ahbreviata, 45 



Cincinnatiensis, 17 



conoidea, 45 



decisa, 24 



Jerrusina, 44 



fusca, 53 



grana, 16 



limosa, 12, 16, 52. 



lusirica, 17 



naticoides, 6, 53 



Nickliniana, 19, 45 



nucha, 26, 54 



Nuitalltana, 24, 54 



porata, 12, 16 



semiiiulis, 26, 54 



suligloliosa, 23 



virens, 26, 54 

 Paludinella, 4, 18, 38, 43, 44 

 P%Na, 48 

 Planorhis, 35, 48 

 Pomatiopsiuje, 4, 5, 6, 12, 29, 38 

 Pomatiopsis, 1, 4, 8, 9, 12, 18, 29, 37 

 Pomatiopsis Binneiji, 20, 45 



lapidaria, 9, 29, 30, 31, 



34, 36 

 Sayana, 33 

 Potamnpyrgias, 4, 20, 49, 55 

 Pomatopyrgus corolla, 50 

 Pi/rglscits, 48 



Pyrgula, 2, 4, 38, 47, 48, 55 

 Pyrgula andicola, 47 

 annulata, 47 

 bicariuata, 47 

 helvetica, 47 

 pyrenaica, 47 



Rissoa, 1, 2, 4, 6, 10, 11, 14, 20, 46 

 Rissoa ulvfF, 43 



ventrosa, 42 

 Rissoidae, 1, 2, 3, 10, 39 

 Rissoiua, 1, 2, 4 

 Rissoinffi, 4, 5, 39 

 Rissoininse, 4, 5 



Setia, 1, 4 



Skenea, 1, 2, 4 



Skeneinse, 4, 5, 39 



Somatof/yra, 23 



Somatogyrus, 1, 4, 9, 12. 20, 21, 23, 



25, 28, 39, 51, 55 

 Somatogyrus depressus, 21, 22, 23, 



52 

 isogonus, 22, 23, 25, 56 

 Sphfprium, 48 



Stenotbyra, 2, 4, 38, 40, 46, 55, 56 

 Stenothyra deltse, 40 

 Subulina, 44 



