HELiX §. 22. 23. 117 



flexis pilosis lyrata, subtus convexa, uiubilico magno scalarifornii 

 perforala; anfr. 6 convexi, angusti; apertura subcircularis, ad 

 basini subangulata ; labrum simplex, prope umbilicum reflexum. 

 — Lat. yH.,alt. Vepoll. (G.) 



Helix ziczac Gould 1846. Exped. shells p. 17. 

 llabitat in Nova Hollandia (New Soutli Wales). 



301. H. tesscllata Muhlfeldt. 



T. umbilicata, discoidea, utrinque plana, lenuis, pallide cor- 

 nea, strigis angustis, undatis, rufis picta; anfr. 6 — 7 angustissimi, 

 ultimus subtus subinflatus; umbilicus mediocris, pervius; aper- 

 lura lunato-rotundata; perist. simplex. — Diam. 4, alt. 2 mill. 

 (Coll. Nr. 158.) 



Helix tessellata Mlf. Mus. Ant. Verz. p. 3 6. 



— — Pfr. Symb. II. p. 40. 



— — Chemn. ed. II. Helix N. 562. t. 89. f. 16—19. 



— Fer. hist. t. 86. f. 4. 



Habitat in insula Juan Fernandez (Guming). 



302. H. epidermia Anton. 



T. late et profunde umbilicata, discoidea, epidermide brun- 

 nea induta, utrinque costulata; spira plana; anfr. 4 sensim ac- 

 crescentes, convexiusculi ; apertura subverticalis, subcircularis; 

 perist. acutum, simplex, marginibus approximatis. — Diam. maj. 5, 

 min. V/i, alt. \% miU. (Coll. Nr. 159.) 



Helix epidermia Antoti Verz. p. 36. N. 1338. 



— — Chemn. ed. II. Helix N. 563. t. 89. f. 20 — 23. 



— costellata Desh. in Fer. hist. p. 19. t. 83. f. 1. 2 *) Nec Orb. 

 Habitat prope Valparaiso Chilensium (Cuming). 



Obs. Gonf. H. coslellata Orb. Nr. 252. 



§. 23. 



303. H. declivis Pfr. f 



T. orbiculata, depresso-conoidea , subtus convexo-depressa, 

 ■pallida; spira conica, depressa; anfr. 6 rufescentes, dej)resso- 

 planiusculi, declives, rugis armatis. crebris, tenuibus, in junio- 

 ribus regularibus, in adultis multidistanlibus majoribus sculpli, 

 infimus ad peripheriam acute carinatus, carina fusco-fasciata aut 

 albida, inferne fascia fusca cincta; umbilicus profundus, angustus, 



*) T. discoidea, supra i)iai)a , sublus lalo unibilicata , fulva, loiigitudiiialiler 

 el obliquc costellata: costellis distantibus submcnibranaceis elatis; anfr. 3 con- 

 vexis in intcrsliliis costcllaruni tcnuc stiialis; apcrtura sini|)lici, scinilunaii, 

 obliqua; labro aculo. — Diam. 5, alt. vi.\ 2 mill (l)li. I. c.) 



