HELIX §. 12. 59 



125. H. indentata Say. 



T. subperforala , depressa, pellucida, pallide cornea, nilidis- 

 sima, lineis radiantibus impressis, reguiariter distantibus (in an- 

 fractu ultimo circa 28) notata; spira planiuscula; anfr. 4ya celc- 

 riter accrescentes , uitimus circa foramen punctiforme cxcavatus ; 

 apertura depressa, ampla, lunaris; perist. simplex, acutum, mar- 

 gine supero antrorsum arcuato. — Diam. maj. 5, min, 472, alt. 

 Syamill. (Coll. Nr. 68.) 



Helix indentata Say in Philad. journ. II. p. 372. 



— — Binn. in Bost. jouin. III. p. -£15. t. 22. f. 3. 



— — Goidd veportp. \ 8 \. l \ 09. 



— — Chemn. ed. II. Helix N. t 90. t. 34. f. 1 2 — 1 S. 

 Habitat in America boreali, New Jersey (Say), Massachuselts 

 ( Gould ) , Philadelphia ( Griffith ). 



126. H. hyalina Ferussac. . :vv.%-7;^ ;:-<{. •^^'"c; 



T. vix subperforata , suborbiculata , arctrSpira, vitrea," dia- 

 phana, glabra, nitidissima; anfr. 6 planulati; apertura angustis- 

 sime lunaris; perist. rectum, simplex. — Diam. maj. i'/». min. 4, 

 alt. 2 mill. (CoII. Nr. 69.) 



Helix hyalina ( Helicella ) Fer. pr. 224 et Mus. ! 



— — Ros&m. VIII. p. 36. f. 530. 



— — Chemn. ed. II. Heiix N. 554. t. 88. f. 20 — 23. 



— contorta Held in Isis 1837. p. 304 ? 



— — Knjn. Bull. Mosc. IX. p. 168? *) 

 Vitrea diaphana Fitzing. syst. Verz. p. 99. 

 Polita contorta Held in Isis 1 837. p. 916? 



Habitat in Germania, Gallia etc. rarior. 



127. H. crystallina Miiller. 



T. perforata, depressa, vitrea, diaphana, glabra, nitidissima; 

 anfr. 4 — 4 '/2 planiusculi ; aperturalunaris; pcrist. rcctum, simplex. 

 Diam. maj. 4, min. 3V2, alt. 1^4 mill. (Coll. Nr. 70.) 

 Helix crystallina Milll. verni. H. p. 23. N. 223. 



— — i)rflj3. p. 118. t. 8. f. 13 — 20. 



— — C. Pfr. I. p. 46. t. 2. f. 36. 



') T. orbiculato-depiessa , subtus convoxiuscula, tonuissima, pollucida, 

 glaberrima , nilida, lactea (colore efflato); anfr. 6 planulatis, ferc acqualibus; 

 spira vix exserta; suturis tenuibus, loco umbilici impressio infundibuliformis; 

 apertura compresso-lunata ad umbilicum angustiore ; perist. simplici. — Diam. 

 I '/2", alt. Ys'"- — I^orma et conslructione sua supcrna Planorbcm conlortum 

 bone commcmorat, atlamon spira ejus paululum cxserta. Sublus sicuti H. fulva 

 condita, praelor aperturam ad umbilicum angustatam et fere acutam. — Habital 

 in regionibus caucasicis. (Krvn. I. c. ) 



