38 HELIX §.8. 



vexus, medio depressus; spira obtusa; apertura obliqua , semi-l 

 rotunda, acuta, anterius superne vix angulata. — Diam. 8. allJ 

 iSyamill. (Guill.) 



Helix succinulata Le Guill. in Revue zool. 18 42. p. 138. 

 13. Minor, tenuior, pallidior. 

 Habitat in insula Gouaham , var. /i in Noukahiwa etc. 



59. H. tongana Quoy. 



T. imperibratu, orbiculato-conica, striatula, fragilis, pellucida, 

 carinata, corneo-albicans; anfr. 6 convexiusculi, ullimus basi sub- 

 impressus; apertura angulato-lunaris; perist. simplex, acutum, 

 margine columellari brevissimo reflexo. — Diam. maj. 7, min. 6"/i, 

 alt. 5 mill. (GoII. Nr. 36.) 



Helix tongana Quoy et Gaim. Astrol. II. p. 130. t. 11. f. 19 — 23. 



— — Lam. ed. Dh. 190. p. 119. 



— — Chemn. ed. II. Helix N. 643. t. 99. f. 28-30. 

 Habitat in insula Tonga Tabou ( Quoy ) , in insula Negros Philippi- 

 narum (Cuming). 



59^. H. pertenuis Gould. "^ . ("^■- 



T. minuta, subglobosa, pellucida, nitidissima, viridi-aurea, 

 imperforata; spira depressa; anfr. V/-2 convexi, ultimus amplus, 

 ad peripheriam angulatus, infra sulcis remotis radiatus; apertura 

 ampla, lunata; labrum simplex. — Lat. '/s, alt. /lo poll. (G.) 



Helix pertenuis Goiild 18 46. Exped. shells p. 20. 

 Ilabitat in insula Aurora. 



Obs. «Aliqunntulum similis H. electrinae et lucidae, sed magis globulosa.» 



60. H. gradata Pfr. . . llLjtJ/.itA'S^ 



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 subtetragono-lunaris ; perist. simplex, 

 acutum, margine columellari breviter et verticaliter descendente, 

 — Diam. maj. 5, min. 4V3, alt. 5 mill. (Mus. Cumilig.) 



Helix gradata Pfr. in Proc. Zool. Soc. 18 46. p. 1 10. 

 Habitat in insula Leyte Philippinarum. 



h s. Differl ab H. tongana praecipuc spira elevala. 



61. H. misella Ferussac..//v '■.);• "y "^^^ 



T. imperforata, orbiculato-convexiuscula,' teiiuis,' obsoletis- 

 sime striatula, nitida, pellucida, pallide cornea; anfr. SJA planius- 

 culi, ultimus carinatus, basi convexiusculus, mcdio imprcssus; 



