HELIX §. 5. 
2 ’) 
Helix siibplkata Lam. ed. Dh. 144. p. 95. 
— — Chemn. ed. II. Helix N. 198. t. 29. f. 1.2- 
Pomatia subplicata Beck ind. p. 44. 
Habitat in insula Baxo prope Porto Sancto. 
23. H. aperta Bom. 
T. imperforata, ovato -globosa, inflata, tenuis, plicalo-striala, 
olivaceo-fusca; anfr. i convexiusculi, rapide accrescentes; apertura 
acute obovalis; perist. simplex, acutum, albo-limbatum. — Diam, 
maj. 26, min. IG/a, ait. 27 milL (Coli. ]NV. 13.) 
Helix aperta Born Mus. p. 387. l. 15. f. 19. 20. 
— — Gray 3Iaiiual p. 127. t. 11. f. 129. 
— — Chemn. ed. U. Helix p. YII. N. 1. t. 1. f 1 —4. 
— terre&Lvis Forsh. (teste Beck). 
— neriloides Chemn. IX. P. 2. p. 150. t. 133. f. 1204. 5. 
•— naticoides Drap. p. 92. i. 5. f. 26. 27. 
— — (Helicogena) Fer. pr. 15. Hist. l. 11. f. 17 — 20. 
— — Lam. 13. p. 69. ed. Dh. p. 35. 
— — Blainv. Malae, p. 460. t. 40. f. 6. 
— — Rossm. V. p. 1. f. 285. (IL f. 156. anim.) 
— — Kiister in Chemn. ed. II. p. 24. 
— karalitana Prunn. testo A'illa catal. 
— Sow. Coiich. Man. f. 5 1 7. 
Cantarexis naticoides Risso IV. p. 64. 
Pomatia ap67'ta Beck ind. p. 44. 
Coenatoiia naticoides Held in Isis 1 837. p. 910. 
Gualt. t. 1 . f. F. 
Habitat in Gallia meridionali, Italia, Sicilia, Graecia, Turcia, 
Algeria, etc., nec non in insula Guernsey (Forbes). 
Obs. Epiphragma hibernum album, vesicale, valde convexum. 
^24. H. tristis Pfr. 
T. imperforata, ovato-globosa, tenuis, striata, linei? concen- 
tricis obsolete decussata, olivaceo-fusca, rufo-5-fasciata, spira 
parvula, conoidea; anfr. 4 convexiusculi, ultimus inflatus; apertura 
lunato-ovalis, intus nitida; perist. simplex, rectum, margine colu- 
mellari dilatato, reflexo, appresso. — Diam. maj. 21, min. 18, ait. 
18 mill. (Coli. IS>. 14.) 
Helix tristis Pfr. in Proc. Zool. Soc. 1845. p. 66. 
— — Philippi Icon. II. 15. p. 184. Helix t. 9. f. 3. 
— — Chemn. ed. II. Helix N. 196. t. 28. f. 20. 21. 
— ceratina Shullleworlh iw Miulieil. d. naturf. Gcs. in Bcrn 1843. 
p. 66. (absque diagnosi.) 
Habitat in insula Corsica, in arenosis prope Ajaccio. (Shutll.) 
