HELIX §. 22. 23. 
117 
flexis pilosis lyrata, subtus convexa, umbilico magno scalariformi 
perforata; aufr. 6 convexi, angusti; apertura subcircularis, ad 
basim subangulala ; labrum simplex, prope umbilicum reflexum. 
— Lat. yjo, ait. Ve poli. (G.) 
Helix ziczac Gonld 1846. Exped. shells p. 17. 
Habitat in Nova Hollandia (New South Wales). 
^301. H. tessellata Muhlfeldt. 
T. umbilicata, discoidea, utrinque plana, tenuis, pallide cor- 
nea, strigis angustis, undatis, rufis picta; anfr. 6 — 7 angustissimi, 
ultimus subtus subinflatus; umbilicus mediocris, pervius; aper- 
tura lunato -rotundata; perist. simplex. — Diam. 4, ait. 2 mill. 
(Coli. Nr. 158.) 
Helix tessellata Mlf. Mus. Ant. Verz. p. 36. 
— — P/r. Symb. II. p. 40. 
— — Chemn. ed. II. Helix N. 562. t. 89. f. 16—19. 
— .... hist. t. 86. f. 4. 
Habitat in insula Juan Fcrnandez (Cuming). 
^ 302. H. cpldermia Anton. 
T. late et profunde umbilicata, discoidea, epidermide brun- 
nea induta, utrinque costulata; spira plana; anfr. 4 sensim ac- 
crescentes, convexiusculi ; apertura sub verticalis, subcircularis; 
perist. acutum, simplex, marginibus approximatis. — Diam. maj. 5, 
min. 4y, ait. 1V4 mill. (Coli. Nr. 159.) 
Helix epidermia Anton Verz. p. 36. N. 1358. 
— — Chemn. ed. II. Helix N. 563. t. 89. f. 20 — 23. 
— costellata Desh. in Fdr. hist. p. 19. t. 83. f. 1.2^) Nec Orh, 
Habitat prope Valparaiso Chilensium (Cuming). 
Obs. Conf. H. costellau Orb. Nr. 252. - AT . yS . jm da 
§. 23. 
303. H. declivis Pfl*. 
T. orbiculata, depresso-conoidea, subtusv.convexo-depressa, 
pallida; spira conica, depressa; anfr. 6 rufescentes, depresso- 
planiusculi, declives, rugis armatis , crebris, tenuibus, in junio- 
ribus regularibus, in adultis multidistantibus majoribus sculpti, 
infimus ad peripheriam acute carinatus, carina fusco-fasciata aut 
albida, inferne fascia fusca cincta; umbilicus profundus, angustus, 
q T. discoidea, supra plana, sublus late umbilicata, fulva, longiludinaliler 
et oblique costellata: costellis distantibus subuienibrauaceis elatis; anfr. 5 con- 
\e\is in interstitiis coslellarum tenue striatis; apertura simplici, semilunaii, 
obliqua; labro acuto. — Diam. 5, ait. vix 2 mill. (Dh. I. c.) 
