HEI.IX §. :35. 103 



giiiibus roinolis, basuli substriclo, columellari vix patcule. — 

 Diam. maj. 7, min. 6, alt. 2% mill. (Mus. Cuming.) 

 Helix volutella Pfr. in Proc. Zool. Soc 1856. p. 33. 

 Ilabitat San Miguel insularuin Azoricarum. 



* 



633. pcmota Bens. {Rv. n. M68. t. 173. — Ch. ed. 



nov. III. p. 388. — Hyalina P/"r Vers. p. 124.) . . Mon.UI. p. 106. 



634. H. ductilis Pfr. 



T. uinbilicata, discoidea, tenuis, sub lente conferle stria- 

 tula, albido-hyalina; spira plana; anfr. fere 5 subplani, sensini 

 accrescentcs , ultimus non descendens, depressus, peripheria 

 rolundatus, basi vix convexior; umbilicus perspectivus, '/4 dia- 

 metri superans; apertura obliqua, late lunaris; perist. simplex, 

 rectum, marginibus vix convergentibus, columellari brevi, ver- 

 ticali, cum basali subangulalim juncto. — Diam. maj. oy^. 

 min. oy.2, alt. 2 mill. (Mus. Cuming.) 



Helix ductilis Pfr. in Proc. Zool. Soc. \8'6G. p. 383. 

 Ilabilat «Drayton Range» Australiao borealis (Slulchbury). 



635. H. Dianae Pfr. 



T. umbilicata, depressa, discoidea, tenuiuscula, conferto 

 striata ot irregulariter subvaricosa, vix nitidiila, nigro-fusca; 

 spira plana ; aufr. 4 convexi, sensim accrescentes, ultinuis 

 non descendons, subdepresso-rotundatus; umbilicus pervius, 

 y^ diamelri subaequans; aportura fere diagonalis, lunato-cir- 

 cularis; perist. simplex, rectum, marginibus convergentibus, 

 columellari superne vix dilatato. — Diam. niaj. iyg, min. I, 

 alt. 2 mill. (CoH. Nr. 268.) 



Helix Dianae Pfr. in Malak. Bl. III. 1850. p. 206. 

 Habitat «Dianu's Peak « insulae St. Holenae (Cutter). 



rt;3G. festinans Shuttl. -j- Moii.HI, p. 106. 



637. trochilioneides Orb. (Coli. 269. — Rv. n. 1247. 

 t. 181. — Hyalina Pfr. Vers. p. 124. — Ilelicella 

 trochiiioides Ad. Gen. p. 119.) - - - 106, 



<»38. spirillus Gould. f (E.\p. Sli. t. 3. f. 45. Diani. 

 maj, 4'/^, niin. 4 niill, — Iheriis spirillus [Cam- 

 pytaeaj Ad. Oen. p. 211. — Nonne praecedenli 

 niniis aflinis ?) - -- 272. 



()31K pcrdcpressa Ad. {Ur. n. 344. t. 66. — Ilyalina 



Pfr. Vors. p. 121.) '. . . . - - - 106. 



(ilO. cyclostomoidcs Pfr. (Coll. 270. — Ilyalina? Pfr. 

 in Malak. Ijl, 1854. p. 179. — Pfr. Vers", p. 124. — 

 HeUcella ctjclostomoides .id. Gen. Y>. US.) - - -107. 



6.|1, mlnuta Villa. •]■ - I. - 1I4. 



