VfiRMKS Testacea. Helix. 
Vtjl. anim. angi. t. 2. /, 27. 
Gualt. teji. EE. 
Swammerd. hibl. nat. t. 10. f, 5. 
Klein ojlr. t. !. /• 8. 
Martin, heri. Maga^z.. t. 8. /. 18. 
V. Born muf. Caej: Kindob. teJl. t. l\,f. 5.6. 
Schroet. Fluaconch. t. 5. 12*15. 
e) Lijl- Conch. f. 4.2. 
Fet. gaz. t. 10. /. II. 100./. 216. 
Clemn. Conch. 9. t. 126. /. 1102. n. i. 2. 
Habitat in Eurnpse y Barbarix aquis ftagnantibus 
id fluviis , lejla diametri l lineae ad \ pollicis , 
pellucida cornea , ratius opaca , temiijjime Jlrlata , 
anfraSfibus 4-5, primo reliquis mulio majori. 
compla^ 21. H. tefla dcoifmii carinata umbilicata conve- 
nata. xa fubtus plana; apertura femicordata. Fn.Juec. 
2177.* 
Muli. zool. d>m, prodr. 2881. hijl. verm. 2. /.i6o. 
346. Planorbis ( umbilicatus ) tefla fufca 
opaca utrinqiie lubuiiibilicala , carina marginali 
infera. 
CeoQ r. tefl. 6, 
Chemn. Conch, 0. t. 127.^. I121-1123. 
Schroet. Ftusconch, t. 5./'. 22.25, ^ 
C./. 4. 
Einl. in Conch. 2. p. 129. t. 4./. i. 
e) Martin. Conch. 4. t, 8./. 22 ? 
Schroet. Flusconch. t. 5./. 27 ? 
Habitat frequens in Europx tif Barbarix aquis Jia- 
gnantihus l 5 ' rivulis, incola nigro : tentaculis rufis, 
iejla diametri i-6i linearum , fufca interdum 
pallida , fuhpellucida , Juhtiliffime transverjim 
Jlrlata , anfrailibus 5-6. 
•cingens. 22. H. tefla fubcarinata imperforata convexa : 
apertura refupinata ; labio pofterius quadiupli- 
