HELIX §. 38. 39. 191 



ultimus antice vix deflexus, basi convexiusculus ; apertura per- 

 obliqua, subcircularis ; perist. continuum, vix disjunctum, tenue, 

 superne rectum, basi breviter reflexum. — Diam. maj. 7, min. 6'/?, 

 alt. 9 mill. (CoII. Nr. 289.) 



Helix turricula Loive Faun. Mader. p. 58. t. 6. f. 21. 



— — Cheiyin. ed. II. Helix N. 573. t. 91 . f. 5 — 7. 

 Turricula turricula Beck ind. p. 10. 



Habitat in insula llheo de Cima, juxta ins. Portosancto. 



493. H. thiarella Webb et Berthelot. 



T. angustissime umbilicata, trochiformis , albo et fusco varie- 

 gata, bicarinata, ad suturam tuberculato-plicata; spira conica, 

 apice obtusa, cornea; anfr. Oy^, ultimus basi confertjm et concen- 

 trice granulato-sulcatus , antice angulatim deflexus; apertura sub- 

 horizontalis, circularis; perist. expansum, continuum, solutum. — 

 Diam. maj. 7, min. 6/3, alt. 5 mill. (CoII. Nr. 290.) 

 Helix thiarella Wehh et Berth. syn. p. 316. 



— — Orh. canar. p. 62. t. 1. f. 26 — 28. 



— — Chemn. ed. U. Helix N. 57 6. t. 9 1 . f. 1 4 — 1 6. 

 Geomitra hicarinata Swns. Malac. p. 166. f. 20. 

 Turricula thiarella Beck ind. p. 1 0. 



Ochthephila thiarella Beck ind. p. 1 8. 

 Habitat in insulis Canariis et Madera. (In Roccellae sarcinis invenit 

 CI. Terver.) 



§. 39. 

 494. H. foUis Ferussac. f 



T. imperforata, ovato - conica , albida; spira obtusa; anfr. 

 4 convexi, ultimus reliquos longe superans, basi fulvescens et 

 cinguhs 3 pallide rufis, interruptis ornatus; apertura lunato-ovalis ; 

 perist. simplex, acutum, margine columellari subrecte descen- 

 dente, dilatato, reflexo, albo. — Diam. 86, alt. 80 mill. (ex ic. 

 spec. unici Mus. Paris.) 



Helix follis (Helicogena) F&. pr. 19. Hist. t. 17. f. 4. 

 Habitat . . . ? 



495. H. undata Lowe. 



T. imperforata, depresse turbinata, nigricanti-fiiscaj^^plicis 

 validis undatim corrugata; spira late conoidea; anfr. 5/4 convexius- 

 culi, ultimus antice valde deflexus; apertura ampla, lunato-ovalis ; 

 perist. superne simplex, marginibus callo tenuissimo junctis , co- 

 lumellari dilatato, appresse reflexo, plano. — Diam, maj. 22, 

 min. 4 9, alt. 14 mill. (Coll. Nr. 291.) 



Helix undata Lowe Faun. Mader. p. 41. t. 5. f. 5. 



