322 HELIX §. 134. 



Helix daiisa De Kay Moll. N. York p. 3 1. t. 2. f. 13? 

 — — Binn. Teir. MoU. 11. p. 107. t. 4 excl. synoii. 



Habitat in Stalibus Unitis occidentalibus. 



Obs. Differt ab H. Pennsylvanica (monente Cl. Bland in litt.) scui- 

 ptura rudiore et inprimis characteribus aperturae. 



2069. H. nSitchclliana 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, anlice 

 subconstrictus et breviter deflexus; apertura diagonalis, lunaris, 

 intus submargaritacea; perist. albolabiatum, maiginibus vix con- 

 vergentibus, subaequaliler reflexis, columellari angustato, adnato, 

 vel subdilatato, patente. — Diam. maj. 1672, min. I^Vg, alt. 10 

 mill. (CoU. Nr. 1110.) 



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



— — Chemn. ed. nov. Helix I. p. 332. t. 36. f. 6 — 8. 



— _ pfr. Mon. I. p. 291. n. 760. 



— — (Patera) Albers Helic. p. 97. 



— — (Mesodon) Pfr. Vers. p. 13-5. 



— MitcheUa Kirtland Obio Rep. p. 173. 



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



Habitat Ohio. 



Obs. Differt ab H. clausa, quacum Cl. Binney (Terr. MoU. II. p. 107) 

 eam junxit, sculptura minuta, spira, etc. 



2070. H. divcsta Gould. 



T. imperforata, depressa, solidula, subruditer costulata, 

 striis minutissimis sub lente decussatula, pallide lutea; spira 

 vix elevata; sutura subcrenulata; anfr. 5 paium convexi, regu- 

 lariter accrescentes, ullimus depressus, peripheria obsolelis- 

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

 vexiusculus; apertura diagonaUs, subauriformis; perist. vaUde 

 alboiabiatum, marginibus subparalielis, late reflexis, columellari 

 dilatato, omnino adnato. — Diam. maj. ISVa, min. 15, alt. 8V2 

 mili. (Coll. Nr. 1111.) 



Helix abjecta Gould, Pfr. Mon. III. p. 270. n. 1.587. 



— — Gould in Binn. Terr. Moll. II. p. 122. t. 13*. f. 2. 



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



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



