HELIX §. 8. 
vexus, medio depressus; spira oblusa; apertura obliqua, semi- 
rotunda, acuta, anterius superne vix angulata. — Diam. 8, ait. 
5/2 mill. (Guill.) 
Helix succimdala Le GuilL in Revue zool. 1842. p. 138. 
Miuor, tenuior, pallidior. 
Habitat in insula Gouaham, var. fi in Noukahiwa etc. 
T. imperforata, orbiculato-conica, striatul agilis, pellucida, 
carinata, corneo-albicans ; anfr. 6 convexiuscul ^ limus basi sub- 
impressus; apertura angulato -lunaris; perist. simplex, acutum, 
margine columellari brevissime reflexo. — Diam. maj. 7, min. 6%, 
ait. 5 mill. (Coli. Nr. 36.) 
Helix tongana Quoy et Gaim, Astrol. II. p. 130. t. H. f. 19 — 23. 
— — Lam. ed. Dh. 190. p. 119. 
— — Chemn. ed. II. Helix N. 643. l. 99. f. 28 — 30. 
Habitat in insula Tonga Tabou (Quoy), in insula Negros Philippi- 
narum (Cuming). 
T. minuta, subglobosa, pellucida, nitidissima, viridi-aurca, 
imperforata; spira depressa; anfr. V/t convexi, ultimus amplus, 
ad periphcrimn angulatus, infra sulcis remotis radiatus; apertura 
ampla, lunata; labrum simplex. — Lat. /«, ait. /lo poli. (G.) 
Helix pertenuis Gmild 18 46. Exped. shells p. 20. 
Habitat in insula Aurora. 
Ohs. « Aliciuantulum similis H. electrinae et lucidae, sed magis globulosa.» 
T. imperforata, globoso-turbinata, striatula, tenuis, hyalina; 
spira turbinata, apice acuta; anfr. 6 convexiusculi, gradati, ultimus 
medio acute carinatus, basi convexus, sub lente minutissime con- 
centrice striatus; apertura subletragono-lunaris ; perist. simplex, 
acutum, margine columellari breAiter et verticaliler descendentia 
— Diam. maj. 5, min. 4Vs, ait. 3 mill. (Mus. Cuming.) 
Helix gradata Pfr, in Proc. Zool. Soc, 1846. p. 1 10. 
Habitat in insula Leylc Philippinarum. 
Ohs. Differt ab H. tongana praecipue spira elevata. 
T. imperforata, orbiculato-convexiuscula , tenuis, obsoletis- 
sime striatula, nitida, pellucida, pallide cornea; anfr. 5/2 planius- 
culi, ultimus carinatus, basi convcxiusculus, medio impressus; 
59*- H. pertenuis Gould. -{* 
60. H. g;radata Pfr. 
61. H. miscUa Ferussac. 
