HELIX §. 36. 105 



§. 36. 



648. H. planella Pfr. 



T. umbilicata, subdiscoidea , tenuissima, ruguloso-striala, 

 pellucida, oleoso-micans, cornea; spira subplana, verlice sub- 

 tili, non prominente; sutura impressa; anfr. 5 vix convexius- 

 culi, sensim accrescentes, ultimus latior, perdepressus, peri- 

 pheria obsolete angulatus, antice non descendens, basi planius- 

 culus ; umbilicus conicus, V5 diametri subaequans; apertura 

 diagonalis, depresse rotundato-lunaris; perist. simplex, rectum, 

 marginibus vix convergentibus , coluraellari declivi, levissime 

 arcuato. ■ — Diam. maj. 10, niin. 8, alt. 3% mill. (Coll. Rossm. 

 nomine //. complanatae.) 



Helix planella Pfr. in Zeitschr. f. Malak. 1853. p. 146. 

 — — (Hyalina) Pfr. Vers. p. 12 4. 



Habitat in Siciiia. 



649. juloidea Forb. {Ri\ n. U64. t. 207. — Discus 



Pfr. Vers. p. 125.) Mon.IJI. p. 106. 



650. H. bombycina Pfr. 



T. umbilicata, depressa, discoidea, tenuis, costulis con- 

 ferlis subarcuatis, subtus minoribus sculpta, sericea, fulva, 

 fasciis permultis castaneis ornata; spira subplana; sutura im- 

 pressa; anfr. 4 celeriter accrescentes, vix convexiusculi , ulti- 

 mus depressus, antice non descendens, basi parum convexus; 

 umbilicus perspectivus, y^ diametri subaequans; apertura dia- 

 gonalis, lunato-circularis; perist. simplex, rectum, marginibus 

 approximatis, dextro antrorsum perdilatato, basali perarcuato, 

 ad umbilicum vix dilatato. — Diam. maj. 14^2, min. HV2, alt. 

 6 mill. (Mus. Cuming.) 



Helix homhycina Pfr. in Proc. Zool. Soc. 1854. p. 54. 



— — Reeve Conch. ic. n. 1314. t. 188. 



— — (Discus) Pfr. Vcrs. p, 123. 

 Habitat Vandiemensland. 



6.51. dissimilis Orb. (Coll. 273. — Rv. n. 629. {. \\\. 

 — Gay Hist. VIII. p. 96. — Discus Pfr. Vers. 

 p. 125. — H. histrio Mlf. — Discus dissmilis Ad 

 Gen. p. 117.) Mou.III. p. 108 



652. H. Gratioletti Hupe. f 



«H. testa orbiculata, depresso-rotundata, tenui, rugosa, 

 maculis undulatis fusco-rubris ornata; umbilico lato; apertura 



