IIELIX §. 77. 413 



iiUrorsum flexo, a inargine renioto, allero subbasali. — Diam. 

 maj. 13, min. II , alt. 7'/. mill. (Coli. Nr. 653.) 

 Helix fallax Suy in Philad. journ. V. p. 119. 



— — Chemn. ed. 11. Helix N. 376. t. G4. f. 7 — 9. 



— tridentata var. Binn. in Bost. joiirn. III. p. 3 82. t. 18. f. 3. 

 /?. Depressior; diani. 13. alt. 6 niill. 



Ilabitat in Virginia et prope Philadelphia; var. (j in Texas (coll, 

 Menk.). 



Obs. Differl a praeccdente forma magis globulosa, umbilico angusliore, 

 aperlura magis eoarclala et denlium inaequalium positione. 



1075. H. obvoluta Muller. 



T. umbilicata, orbiculata, utrinque plana , brunnea, opaca, 

 pilosa; spira medio concava; anfr, 6 angusti, convexiusculi, penul- 

 limus prominulus, ultimus compressus, antice vix descendens, 

 scrobiculatus; apertura obtuse triangularis; perist. reflexum, intus 

 lilacinum, margine dextro et basali obtuse unidentalis, — Diam. 

 maj. 13, min. 12, alt. 6 mill. (Coll. Nr. 634.) 

 Helix obvoluta Miill. verm. II. p. 27. N. 229. 



— — (Helicodonta) Fer. pr. 107. Hist. l. 51. f. 4. 



— — Lam. 76. p. 86. ed. Dh. p. 63. 



— — C. Pfr. I. p. 41. t. 2. f. 28. 



— — Blainv. Malac. p. 461. t. 40. f. 7. 



— — Rossm. I. p. 69. f. 21. 



— — Desh. in Fer. hist. p. 16. 



— — Gray/ 3Ian. p. 139. t. 11. f. 131. 



— — Chemn. ed. II. Hclix N. 377. t. 64. f. 13 — 15, 



— trigonophora Lam. in Journ. d'hist. nat. t. 42. f. 2. 



— hilahiata 0/w« Adriat. p. 177. 



— holosericea Gmel. 186. p. 3641. 

 Helicodonta ohvohda Risso IV. p. 65. N, 141. 

 Trigonostoma ohvolutwn Fitzing. syst. Verz. p. 98. 



— — Hartm. Gast. I. p. 14. t. 6. 



Vortex ohvoluta Beck ind. p. 29. 

 Gonostoma ohvolidmn Held in Isis 1837, p, 915, 

 Ilabitat in Europae borealis et mediae terris plerisque. 

 Obs. Huc referenda H. parvula Harlm. olim. 



1076. H. holoserica Studer. 



T. umbilicata, orbiculata, depressa, subtus convexa, cornea, 

 tenuis, holoserica; anfr. V/2 planulati, ultimus antice constrictus, 

 scrobiculatus; apertura trisinuata; perist. latum, angulalim re- 

 flexum, labiatum, valide bidentatum. — Diam. maj. 11, min. 10, 

 alt. 5'/a miil. (Coll. Nr. 655.) 



Helix holoserica Stud. Verz. p, 16. 



