109 



Bourg., Planorbis umbilicatus var. catinus West., Plan. 

 Dazirri Mörch, PL riparius West, und Pisidium pusillum 

 Gmel. 



Die Diaa'iiosen der neuen Arten, die noch nirgends 

 mitgetheilt sind, reihen wir hier an. 



1. Pupa Theeli. West. Sibir. Mollusk p. 102. 



Testa dextrorsa, ovato-oblonga, cvlindracea, obtusa, 

 alba, opaca, laevis: anfr. f) 1 /., convexi, lente accrescentes, 

 sutura profunda perobliqua separati, ultimus major, basi 

 rotundatus, antice ascendens, pone aperturam callo trans- 

 versali concolori cinctus, inter callum et aperturam con- 

 strictus; apertura rotundnta. 5 dentata: dentc parietali 

 lamelliformi, alto, subrectangulari , superne mcdio im- 

 presso, dentibus palatalibus 2, profundis brevibus, cum 

 callo adhärcntibus, columellaribus 2, superior transver- 

 sali, inferiore obsoleto, denticuliformi, peristoma reHexius- 

 culuni, marginibus callo tenui junctis, exteriore paullisper 

 curvatiore, superne obsolete angulato. 



Long. 2 1 / 4 , diam. l 1 /, mm. 



Hab. Mikoulina 



2. Pupa inermis West. Sibir. Moll. p. 103. 



Testa dextrorsa, umbilicato-perforata, ovata, tenuis- 

 sime striata, corneo-rufescens, spira brevissima^, obtusa ; 

 anfr. 5 convexi, sutura profunda antice valde ascendente 

 separati, ultimus penultimo parum brevior ac multo 

 latior, penultimus a latere dextro visus sutura perobliqua 

 postice, ultimus autem antice duplo latiores; apertura 

 sat lateralis, deorsum producta, ovalis, edentula; peris- 

 toma intus levissime albido-labiatum, marginibus callo 

 tenui lato albo junctis, exteriore recto, columellari su- 

 perne rerlexo. — 



Long. 2, diam. l l / 3 mm. — 



Hab. Seliwarinskoje. — - 



