102 °— 
Valvata aliena nov. sp. 
Testa perforata, rimata vel raro subexumbilicata, oblique 
globoso-trochoidea, nitidula, cornea, subtus et ad su- 
turam albida, supra medium anfractus ultimi fascia 
lata virescenti brunnea vel olivacea ornata, spira rufes- 
centi-brunnea, sat regulariter subeostulato-striata, subtus 
saepe distincte spiraliter lineata et plerumque parce 
malleata; anfr. 4!/,, sutura mediocri, raro profundius- 
cula, separati, econvexiusculi, ultimus ventrosus, rotun- 
datus, altior quam latus; apertura magna, intus in 
palato ad basin et superne infra suturam valide mar- 
garitacea, rotundata, superne paulisper angulata, mar- 
ginibus forte 'arcuatis discontinuis, in pariete semper 
sat longe disjunctis, callo tenui vel saepius linea 
obscura tenuissima vix conspicua junctis, externo 
acuto, recto, columellari ad perforationem expanso, 
non reflexo. Diam. 51/,—6!],, alt. 5—5!), 
' Hab. in Sibiria ad Jenissei, Nischnij Inbatsk (lat. 63° 50‘). 
Sphaerium levinodis nov. Sp. 
Concha globosa, ventricosa; umbones rotundati, vix pro- 
minuli; dens cardinalis interior valvulae sinistrae tenuis, 
in forma literae S curvatus. Long. 10, diam. 8, crass. 
6!/, mm. 
Hab. in Sibiria prope Jenissei ad Sargutskoj (lat. 68° 50°). 
Sphaerium nitidum nov. sp. Cless. 
Concha globosa, ventricosa; umbones tumidi, superne 
mammillis magnis; dens cardinalis interior valvulae 
sinistrae paullulum curvatus, ab interiore tantum pro 
dimidia parte occultatus. 
Hab. in: Sibiria prope Jenissei ad Dudino (lat. 69° 15‘) 
et Lusino (lat. 68° 40"). 
