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Fossarina truncatula 

 Bulinus fontinalis 

 Nauta bypnorum 

 Coretus cornens 



» » v. etruscus 



Tropidiscos umbilicatus 



» » v. submar- 



ginatus 

 » carinatus 



» » v. dubius 



Gyrorbis vortex 



» leu costuma 

 Gyraulus albus 

 Armiger nautileus 

 Hippeutis coniplanatus 

 Segmcntina nitida 

 Velletia lacustris 

 Ericia elegans 

 Paludina contecta 



» » v. bracbya 



» pyramidalis 



Paludina pyramidalis v. rossmasslori 



» vivipara 

 Elona tentaculat.i 

 Cicinna piscinalis 

 Gyrorbis cristata 

 Teodoxus fluviatilis 

 Corneola cornea 



» ovalis 

 Calyculina lacustris 

 Flumina amnica 

 Fossarina casertana 



» intermedia 

 Unio elongatulus 

 » requiem 

 » falsus 

 Leguminaia moreleti 

 » depressa 

 Euanodonta leprosa 



» oblonga 



» anatinella 



» stabile! 



b) Specie viventi nella pianura subappennina, mancanti 

 nella pianura lombarda. 



Xeropbila etnisca 

 Tacliea nemoralis v. etrusca 

 » » v. alpbea 



Macularia vermiculata 

 Alaea moulinsiana 

 Vertigo angustior 

 Zua lubrica v. exigna? 

 Arnphibina megalonyxia v. inconcinna 

 Carychium tridentatum 

 Gul naria lagotis 



» peregroxovata 

 Gyrorbis spirorbis v. tiberii 

 Rathyomphalus contortus 



Ancylastrurn costatum 



Bythinella compressa 



Gyrorbis cristata 



Corneola mamillana 



Caliculina brochoniana v. stoini 



Fossarina obtusalis 



Unio rbynchetimis 



» nitidus 



» strobeli 



» veillanensis 

 Euanodonta cygnea 



» rossmasleriana 



