322 HELIX §. 134. 



Helix clansa De Kay Moll. N. Yoik p. 31. t. 2. f. 13? 

 — — Bimi. TeiT. Moll. II. p. 107. t. 4 excl. synon. 



Habitat in Statibus Unitis occidentalibus. 



Obs. Differt ab H. Pennsylvanica (monente Cl. Blancl in litt.) scul- 

 ptura rudiore et inpriniis characteribus aperturae. 



2069. H. Mitchelliana Lea. 



T. imperforata vel anguste perforata, depresse conoideo- 

 globosa, tenuis, conferte striata et sub lente confertissime de- 

 cussata, pellucida, sericea, lutea; spira breviter conoidea; anfr. 

 5 parum convexi, sensim accrescentes, ultimus ventrosus, antice 

 subconstrictus et breviter deflexus; apertura diagonalis, lunaris, 

 intus submargaritacea; perist. albolabiatum, marginibus vix con- 

 vergentibus, subaequaliter reflexis, columellari angustato, adnato, 

 vel subdilatato, patente. — Diam. maj. I6V2, min. 4473,311. 10 

 mill. (CoII. Nr. 1110.) 



Helix Mitchelliana Lea Obs. II. p. 87. t. 23. f. 71. 



— — Chemn. ed. nov. Helix I. p. 332. t. 56. f. 6 — 8. 



— — Pfr. Mon. I. p. 291. n. 760. 



— — (Patera) Albers Helic. p. 97. 



— — (Mesodon) Pfr. Vers. p. 135. 



— Mitchella Kirtland Ohio Rep. p. 173. 



Anchistoma Michelinianum (Mesodon) H. et A. Adams Gen. II. p. 206. 



Habitat Ohio. 



Obs. Differt ab H. clausa, quacuni Cl. Binney (Terr. Moll. II. p. 107) 

 eam junxit, sculptura minuta, spira, etc. 



2070. H. divesta Gould. 



T. imperforata, depressa, solidula, subruditer costulata, 

 striis minutissimis sub lente decussalula, pallide lutea; spira 

 vix elevala; sutura subcrenulata; anft\ o parum convexi, regu- 

 lariter accrescentes, ultimus depressus, peripheria obsoletis- 

 sime angulatus, subconstrictus, antice vix descendens, basi con- 

 vexiusculus; apertura diagonalis, subaurifoi^mis; perist. valide 

 albolabiatum, marginibus subpai^allelis, late reflexis, columellari 

 dilatato, omnino adnato. — Diam. maj. I8Y2, min. 15, alt. Sy^ 

 mill. (Goll. Nr. 1111.) 



Helix ahjecta Gould, Pfr. Mon. III. p. 270. n. 1587. 



— — Gould in Binn. Terr. Moll. U. p. 122. t. 13^ f. 2. 



— divesta Gould in Binn. Terr. Moll. II. p. 358. 



Habitat in Statibus Unitis occidentalibus, Arkansas (W. G. Binney). 



