100 HELIX §. 19. 



431. H. filiola Ferussac. •{• 



T. orbiculato-depressa, latissime umbilicata, apice obtu- 

 sissima, longitudinaliler strialo-plicata, rufo-castanea; anfr. con- 

 vexi, angusti, ultimus cylindraceus; striae regularcs, ad um- 

 bilicum furcatae; apertura minima, obliqua, simplex, semi- 

 lunaris. — Diam. 9, alt. SVa mill. (Desh. ) 

 Helix filiola Fer. Mus. 



— — Desh. in Fer. hist. I. p. 82. N. 108. t. 86. f. 1. 



Habitat in insula Tonga (Quoy). 



432. striatclla Anth. (CoU. 191. — De Kay New- 



Yoik Moll. p. 43. t. 3. f. 40. — Chemn. ed. nov. 



II, p. 115. — Patula Alb. p. 64.) Mon. I. p. 104. 



433. Belcheri Pfr - - - 104. 



434. gradata Gould. •{• (Proc. Bost. Soc. 1846. p. 



172 ct Exped. sliells 1851. p. 49. f. 48.) - - - 104. 



435. ruderata Stud. (Coll. 192. — Cliemn. ed. nov. 



I. p. 187. — Desh. in Fer. hist. I. p. 81. N. 106. 



— PaUila Alb. p. 64.) - - - 105. 



436. rotundata Mull. (Coll. 193. — Chemn. ed. nov. 



I. p. 182. — Chenu t. 5. f. 2. — Patula Alb. p. 



64, — H. rotunda Desh. 1. c. p. 79. N. 104.) . - - - 105. 



437. H. gamma Pfr. 



T. umbilicata, depressa, tenuiuscula, confertissime costu- 

 lato-striata , diaphana, pallide cornea, rufulo-nebulata; spira 

 vix convexiuscula; sutura impressa; anfr. 5 convexiusculi, 

 lente cresceutes, ultimus non descendens, subtus convexus; 

 umbilicus latiuscuIuS; conicus; apertura subverticalis, rotun- 

 dato-lunaris; perist. simplex, rectum, marginibus subconniven- 

 tibus, regulariter arcualis. — Diam. 3, alt. -1 Yg mill. (Coll. 

 Nr. 194.) 



Helix gamma Pfr. in Proc. Zool. Soc. 18S1. Dec. 

 Habitat in Nova Seelandia (Strange). 



43S. H. diminuta Adams. 



T. late umbilicata, depressa, subdiscoidea, tenuis, utrin- 

 que subconfertim plicato-costata, diaphana, virenti- vel corneo- 

 albida; spira vix elevata, obtusa; sulura profunda; anfr. 4 

 convexi, subaequales, ultimus non descendens, basi subplanu- 

 latus; apertura parvula, vix obliqua, lunato-subcircularis; 

 perist. simplex, acutum, tenue. — Diam. maj. 3, min. 2%, 

 alt. IV3 mill. (Goll. Nr. 193.) 



Helix diminuta Adams Contrib. lo Conchol. N. 3. p. 36. 



— — Chemn. ed. 11. Helix N. 830. t. 129. f. 53 — 55. 

 Habitat in insula .Tamaica. 



