à — 391 — 
reflexiusculo, intus albido, margine columellari dilatato, intus 
tubere elongato, calloso instructo. 
Diam, 13, altit, 8 mill, — fTaiti. (Mus. Paris.) 
132. Helix instabilis Zgl — Theba instab. Beck p. 13. 
— Helix leopolitana Andr. Rm. Vill. 518. — T. late umbilicata, 
depressa. striato-rugosa, solida, albida: anfr, 5 convexis, lente 
crescentibus, ultimo terete, vix descendente; apertura orbiculari; 
perist. simplice, acuto, marginibus fere contiguis. 
Diam. 14, altit, 8'/, mill. -— Gallicia. 
&. minor, fusco-radiata et obsolete fasciata. Diam, 10!/, 
altit. 5 mill. 
133. Helix intorta Sow. Proc. zool. soc. 1840, p. 168. — 
T. depresso-globosa, tenui, diaphana, non nitente, subtilissime 
striata, coloribus varia; sutura impressa; anfr. 4'/, convcxiusculis, 
ultimo inflato: columella oblique descendente, acuta, subexcavata; 
apertura lunato-rotundata: perist. simplice, vix reflexiusculo. 
Diam. 33, altit. 19—21 mill, — Rat. anfr, — 4 : 7. — Insule 
Bohol, Negros, Siquijor. (Cuming.) 
Variat colore albido, citrino, roseo, sulphureo vel cinnamo- 
meo, fasciis interdum nullis, plerumque 3 pallide rufis vel nigri- 
cantibus, peristomate albo aut rufo vel rosco marginato. 
Ab Hel. Valenciennesii Eyd., cui persimilis, semper distingui 
potest anfractibus (in illa semper 4) convexioribus, sensim cres- 
centibus (in illa — 1: 2), ultimo inflato (in illa obsolete angulato), 
apertura lateraliter non dilatata, perist. vix reflexo. 
134. Helix labyrinthica Say Philad. journ. I. p. 124. — 
Helicodonta labyrinth. Fér. pr. 111. t. 51 B. f. 1. — T. umbilicata, 
conica, costulata, saturate rufa, subtus pallidiore: spira obtusa; 
anfr. 5 —6 convexiusculis; umbilico angusto, pervio; apertura lu- 
nari; perist, reflexo; dente unico lamelliformi, aperturz opposito 
in ventre anfractus penultimi. 
Diam. 2'/,, altit. 1'/, mill. — America bor. (in fungis ligni 
putridi: Say.) 
135. Helix lineata Say Philad, journ. I. p. 18. IT. p. 373. 
— Helicella Fér. pr. 195. t. 79. f. 1. — Eyryomphala Beck p. 8. 
— T. late umbilicata, subdiscoidea, tenni, pallide flavescente, 
striis concentricis confertis lineata: spira brevissima; anfr. 4— 5, 
sutura impressa distinctis, intus pluries remote bidentatis; aper- 
tura lunata; perist. simplicc. 
Diam, 3'/,, altit, 1'/, mill. — Philadelphia, Harrigate. 
136. Helix Listeri Gray. — Caroc, List. Brod. Proc. zool. 
soc. 1841. p. 37. —  Caroc. gallina Cum. — List. t. 66. f. 64. 
imperf. — T, umbilicata, depressa, irregulari, lenticulari, superne 
