113 



sed tenue albo-labiatum, saepe tarnen simplex, lamella tenui 

 continuum. Diam. 8— S { j. 2 , ü ^- a d apert. 2' 2 / 3 mm. 



Planorbis rossmaessleri Westerlund Exp. Grit. Moll. 1871, 

 p. 134 & Fauna Moll. Suec, Norv. & Dan. 1873, p. 395. 



Habitat in Norwegia, Lapponia & Fennla. 



17. Planorbis limophilus Westerl. (Malak. Blätter. 1867. Taf - 4. Fig. 

 nA ,, 16 — 18. 



p. 204.) 



Testa depressa, supra centro concaviuscula, subtus an- 

 fractibus elevatis in centro umbilicata, corneo-lutescens, cum 

 animale vivo pulchre coccineo-rufa, glaberrima, nitidula, stri- 

 ata, subtilissime spiraliter striata; an fr. 5 parum celeriter 

 accrescentes, teretes, ultimus demum depressiusculus, non 

 carinati vel ultimus rarissime linea tenuissima carinali cinc- 

 tus; sutura utrinque profunda; apertura rotundata, ne 

 quidem minime superne angulata, valde obliqua; peristoma 

 acutum, simplex, fragile, margine exteriore producto, colu- 

 mellari valde sinuato. Diam. 5 mm. 



Habitat in Suecia, Norwegia et Tirolia. 



18. Planorbis crosseanus Bourg. (Mal. du Lac des Taf. 4. Fig. 

 quatre cantons. 1862. p. 42.) 19 ~ 21, 



Testa complanata, supra paullulum concava, infra an- 

 fractibus depressis late et valide pervio- vel subinfundibuli- 

 forme-concava, sordide fulvo-cornea ac transverse spiraliter- 

 que striatula, tessellata; anfr. 5, convexi, regulariter cres- 

 centes, sutura profunda separati, ultimus rotunclatus, ad aper- 

 turam vix expansus; apertura parum obliqua, rotundata; 

 peristoma externe subcirculare arcuatum, fere continuum, 

 marginibus callo junctis. Diam. 6 mm. 



? Planorbis cajiocestianus Vidovic, Spir. Brusina Contr. 

 fauna moll. Dalmat. 1866, p. 56, f. 5. 



Habitat in Gallia, Helvetia fBourg.,), Tirolia (ad 

 Innsbruck) et forte ad Capocesto in Dalmatia. 



19. Planorbis glaber Jeffr. (Trans. Linn. Soc. 1830. Taf. 4. Fig. 

 p. 387.) 22 -24- 



Testa utrinque centro concava, tenera, nitida, subtilis- 



Mal. Bl. XXII. 8 



