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b)

Amphisphyra globosa: dens latus, subrecta ngu Ius, acie transversa
serrulata; uncinus unicus unguicularis, gracilis, basi expansus,
ex tus alatus.

c)

Cylichna alba: dens parvus compressus erectus, supra latior, acie
leviter producta, serrulata; uncini 6, primo maximo, basi
utrin-que producta, cuspide valida deflexa intus denticulata, reliquis
minutis curvato-unguicularibus.

d) Rhachis aut dentata aut inermis; pleura uncinis
numerosis similibus.

Acera bullata: dens minutus, erectus, basi latiore utrfnque
producta, capitulo inflato, superne impresso, acie deflexa
unieu-spide, utrinque cristato-denticulata; uncini circ* 21, longe
hamati, media serie longiores, primis intus breviter alatis,
serru-latis, sequentibus semper gracilioribus.

Api y si a punctata: dens basi utrinque divaricato-producta, capitulo
recurvo, unicuspide, utrinque lobato; uncini circ. 13 minuti,
unguiculares, denticulati et ad flexuram iobato-dentati, extimis
deformibus.

Bulla physis: dens nullus; uncini circ. 13 subaequales crassi,
hamati, antice et b8si producti, marginis dentibus 4, 5 inaequalibus.

Tornate!Ia spec.: dens nullus; uncini 11, longe fracto-hamati,
media serie majores, intus rotundato-alati, extus ad flexuram

cristato-denticulati.

Pulmo naia. Membrana lingualis lata, plana vel aliquantum
concava, rhachi unidentata, pleurarum uncinis numerosis. Series Helicea

cum Bullis connectens.

Lymnaeus stagnalis: dens minutus, compressus, acie simplici
de-curva; uncini circ. 32 robusti, crassi, cuspide extus dente
magno, in ultimis duplici, armato.

Succi nea amphibia: dens compressus validus, acie tricuspide;
uncini crassi, robusti, ad flexuram inflati et extus dente, intus
lobo muniti, in ultimis duplici.

Auricula livida: dens minutus, medio dilatatus, acie unicuspide;
uncini circ. 31 basi producti inflati, ad flexuram incrassati.

Ancylus fluviatilis: dens valde compressus, capitulo subinflato,
unicuspide; uncini circ. 30, inflexo-hamati, primis simplicibus,
ultimis ad flexuram constrictis et denticulatis.

Incerte sedis.

Janthina fragilis: dens nullus; uncini unguiculares, graciles, antice
in stylum obtusum longe producti, leviter arcuati, simplices.

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