92 



4. Helix viridula Menlte. 

 (Taf. I. f. 1. a. b. c. 2.) 

 T. umbilicata, depressa, tenuis, nitida, pellucida, su- 

 perne distincte striata, subtus laevigata, concolor, hyalina 

 aut pallide corneo- virescens; spira convexiuscula; sutura 

 anfractibus supra paulum impressis, submarginata; anfr. 4 1 / 2 , 

 sensim accrescentes, ultimus depresse rotundatus, basi con- 

 vexiusculus; umbilicus mediocris, pervius; apertura parum 

 obliqua, lunato-orbicularis , 2 / 5 testae latitudinis aequans; 

 perist. simplex, acutum , margine columellari parum dilata- 

 tum. — Diam. maj. 5,5, min. 5; alt. 3 mm. 



Helix viridula Menke, synops. ed. 2, p. 127. (1830.) 



— — Scholz , Schlesiens Land- und Süssw.- 



Moll. p. 36. (1843.) 

 Helicella viridula Beck, ind. moll. p. 7. (1837.) 

 Helix pura y Pfeiffer, mon. hei. I. p. 96. (1848.) 



— — var. Malm in Götheb. samh. handl. f. 1851. 



p. 116. 



— — ß Nordenskjöld und Nylander, Finl. moll. 



p. 27. (1856.) 



— — v. Martens, in malakol. Bl. f. 1856. p. 81. 



— — Alder in transact. of nat. bist. soc. of\ 



Northumberl. f. 1831. p. 37; und in Jar- 



dine a. Selby magaz. of zool. a. bot. 1837. 



Zonites purus Gray, new ed. of Turt. man. (1840.)' 



— — Forbes a. Hanley, hist. of Brit. moll. IV. 



p. 37. t. 121. f. 5. 6. (1853.) 



— — Moquin Tandon, hist. nat. d. moll. II. 



p. 87. t. 9. f. 22-25. (1855.) 



— — Macgillivray, hist. of moll. anim. of Scotl. 



p. 92. (1844.) 

 Helix clara Held in Isis 1837. p. 902. 

 Polita — — — — p. 916. 

 Helix vitrina Ferussac, prodr. p. 40. (1821.) 



— — v. Charpentier, catal. d. moll. p. 13. (1837.) 



