100 HELIX §. 19. 



431. H. filiola Ferussac. ^* 



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

 sissima, iongitudinaliter striato-plicata, rufo-castanea; anfr. con- 

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

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

 lunaris. — Diam. 9, alt. 37^ mili. (Desh. ) 

 Helix filiola Fer. Mus. 

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

 Habitat in insula Tonga (Quoy). 



432. striatella Anth. (Goll. 191. — De Kay New- 



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

 II. p. M5. — Palula Alh. p. 64.) 



433. Belcheri Pfr 



434. gradata Gould. 4* (Proc. Bost. Soc. 1846. p 



172 et Exped. shells 1851. p. 49. f. 48.) ... 



435. ruderata Stud. (CoU. 192. — Chemn. ed. nov 



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

 — Patula Alb. p. 64.) 



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



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

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



Mon. I. p. 104. 



- ~ - 104. 



- - - 104. 



105. 



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 crescentes, ultimus non descendens, subtus convexus; 

 umbilicus latiusculuS; conicus; apertura subverticalis, rotun- 

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

 tibus, regulariter arcuatis. — Diam. 3, alt. i Vg mill. (Coll. 

 Nr. 194.) 



Helix gamma Pfr. in Proc, Zool. Soc. 1851. 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; sutura profunda; anfr. 4 

 convexi, subaequales, ultimus non desccndens, basi subplanu- 

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

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

 alt. IV3 mill. (Goll. Nr. 195.) 



Helix diminuta Adams Contiib. to Conchol. N. 3. p. 36. 

 — — Chetnn. ed. II. Helix N. 830. t. U9. f. 53 — 55. 



Habitat in insula Jamaica. 



