52 
HELIX §. M. 12. 
ovata, anterius subangulata, margine acuta; umbilicus minutissi- 
mus, obsoletus. — Diam. 7, ait. 6 mill. (Guill. ) 
Helix concentnca Le Guillou in Reviie zool. 1842. p. I 39. 
Habitat in insula Tongaiia: Vavao. 
100. H. pacifica Pfr. 
T. perforata, subtrochiformis, tenuis, pellucida, striatula, 
cornea; spira conoidea, acutiuscula; anfr. 6 — 6/2 convexiusculi, 
ultimus acute carinatus, basi paulo convexior, laeyigatus, nitidus; 
apertura depressa, angulato -lunaris; perist. simplex, acutum, 
margine columellari vix dilatato, in perforationem punctiformem 
inserto. — Diam. maj. 5ys, min. 5, all. 4 mill. (Cbll. Nr. 55.) 
Helix pacifica Pfr. Symb. in. p. 66. 
— — Chemn. ed. II. Helix N. 549. t. 88. f. 3—5. 
Habitat in insula : Cocos isiand oceani pacifici. 
0 b s. Similis sequenti, basi multo mimis convexa et apertura lunari diversa. 
101. H. livida (Stenopus) GuUding. 
T. perforata, conica, tenuis, striatula, fusco -cornea, dia- 
pliana; spira conica, obtusiuscula; anfr. 6 convexiusculi, ultimus 
basi ventrosus, supra medium carinatus; apertura rotundalo- 
lunaris; perist. simplex, acutum, rectum. — Diam. maj. lyi, 
min. 4, ait. S/a mill. (GoII. Metcalf.) 
Stenopus lividus Guild. in Zool. Journ. lll. p. 528. I. suppi. 27. 
f. 1-3. 
— — Soiu. Conch. Man. f. 516. 
Habitat in insula St, Vincentii. 
§. 12 . 
^ 102. H, stolephora Valcncicnucs. 
T. subobtecte perforata, subdiscoidea, sublaevigala , oblique 
striata, obtuse angulata, superne depressa, pallidissime carneo- 
ful vescens, basi convexa, infra angulum fascia rufa, deorsum pal- 
lescente, reticulato-striata circumdata; anfr. 4 planiusculi; aper- 
tura perobliqua, valde depressa; perist. vix incrassatum, margi- 
nibus callo perforationem fere tegente junctis. — R. a. = 4:9.— 
Diam. maj. 52, min. 40, ait. 20 mill. (Coli. Nr. 56.) 
Helix stolephora Valenc. in Humb. voy. Zool. II. p. 2 42. t. 56. f. 4. 
— — Pfr. in Zeitschr. f. 3fal. 1844. p. 179. 
— — Chemn. ed, II. Helix N. 162. t. 32. f. 1.2. 
— Imphlhahnus (Helicella) Fer. pr. 238. Rull. zool. 1835. p. 33. 
— Lamarclxiana p Pfr. Synil>. II. p. 19. 
