IIELIX §. 12. 
59 
125. H. indentata Say. 
T. subperforata, depressa, pellucida, pallide cornea, nitidis- 
sima, lineis radiantibus impressis, regulariter distantibus (in an- 
fractu ultimo circa 28) notata; spira planiuscula; anfr. cele- 
riter accrescentes, ultimus circa foramen punctiforme excavatus; 
apertura depressa, ampla, lunaris; perisl, simplex, acutum, mar- 
gine supero antrorsum arcuato. — Diam. maj. 5, min, ait. 
syamill. (Coli. Nr. 68.) 
llolkc indeniaia Say in Philad. joiirn. H. p. 372. 
— — Binn. in Bost. journ. III. p. 4 15. t. 22. f. 3. 
— — Goidd report p. 1 8 1 . f. 109. 
— — Chemn, ed. II. Ilelix N. 190. l. 34. f. 12 — 15. 
Habitat in America borcali, New Jersey (Say), Massachusetts 
(Gould), Philadelphia (Grifllth). 
^ 126. H. hyalina Fcrussac. 
T. vix subperforata, suborbiculata , arctispira, vitrea, dia- 
phana, glabra, nitidissima; anfr. Gplanulati; apertura angustis- 
sime lunaris; perist. rectum, simplex. — Diam. maj. 473 , min. 4, 
ait. 2 mill. (Coll. Nr. 69.) 
Helix hyalina (Hclicella) pr. 224 ct Mus.! 
— — Rossm, VIII. p. 36. f. 530. 
— — Chemn, ed. II. IlelLx N. 554. t. 88. f. 20 — 23. 
— contorta Ileld in Isis 1837. p. 304 ? 
— — Kryn. Bull. Mose. IX. p. 168?*) 
Vitrea diaphana Fitzing, syst. Verz. p. 99. 
Polita coyitorta Held in Isis 1837. p. 916? 
Habitat in Germania, Gallia ctc. rarior. 
y/ 127. H. crystallina Mulier. 
T. perforata, depressa, vitrea, diaphana, glabra, nitidissima; 
anfr. 4 — 4'/2 planiusculi; apertura lunaris; perist. rectum, simplex. 
Diam. maj. 4, min. 3*4, ait. iy4 mill. (Coli. Nr. 70.) 
Ilelix crystallina MillL verni. II. p. 23. N. 223. 
— — Drap. p. 118. t. 8. f. 13— -2^). 
_ — C. Pfr. I. p. 46. t. 2. f. 36. 
*) T. orbiculalo-dcpressa , sublus convcxiuscula , lenuissima. pellucida, 
glaberrima, nitida, lacl(?a (colore efflato); anfr. 6 plamilalis, fere accjiialibii.s; 
spira ^ix exserta; suturis tenuibus, loco umbilici impressio infundibiiliforniis: 
apertura compresso-lunala ad umbilicum angustiore; perist. simi)lici, — Diam. 
I V 2 , ait. Y/". — Forma et conslructiono sua superna PIniiorJ)cm coiitorlimi 
bene commemorat, attamen spira ejus paululum exserta. Subtus siculi 11. fulva 
condita, praeter aperturam ad umbilicum aiigustalam ol fere acutam — Ilabitaf 
in rcgioniiuis eaiicasicis. (Kryn. I. c.) 
