HELIX §. 124. 125. 311 



plana, medio immersa; anfr. 10 convexi, angustissimi, ultimus 

 duplo latior, antiee descendens, prope aperturam cicatrice plana 

 constrictus ; umbilicus cyathiformis , dimidium diametri occu- 

 pans; apertura perobliqua, subtriangulari-Iunaris; perist. bre- 

 viter reflexum , raarginibus remotis, supero subdepresso. — 

 Diam. maj. 13, min. "^11, alt. 4 mill. (Coll. Nr. 1057.) 



Helix helicycloides Orb., Pfr. Mon. I. p. 406. n. 1056. Nec III. 



p. 107. 



— — Pfr. in Malak. Bl. 1854. p. 221. 



— — (Systrophia) Pfr. Vers. p. 136. 

 Habitat in Columbia ad fluvium Maranhon (Warszewicz). 



1996. H. systropha Albers. 



T. late umbilicata, depressa, fere discoidea, tenuis, stria- 

 tula, parum nitida, sordide cornea; spira brevissime elevata, 

 vertice minuto; anfr. 12 convexi, angustissimi, ultimus paullo 

 latior, antice vix descendens, basi inflatus; umbilicus conicus, 

 Ya diametri aequans; apertura diagonalis, lunaris; perist. bre- 

 vissime reflexum, marginibus remotis, supero antrorsum sub- 

 dilatato. — Diam. maj. I3V2, min. 12, alt. 5 mill. (Coll. Nr. 1058.) 

 Helix systropha Albers in Malak. BI. 1854. p. 215. 



— — Pfr. Novit. conch. I. p. 26. n. 43. t. 7. f. 9—11. 



— — (Systrophia) Pfr. Vers. p. 136. 



Habitat in Columbia ad fluvium Maranhon (Warszewicz). 



1997 H. stenostrepta PfV. 



T. umbilicata, depressa, discoidea, tenuiuscula, striatula, 

 nitidula, pallide cornea; spira plana; anfr. Sy^ convexiusculi, 

 angusti, ultimus fere duplo latior, antice dilatatus, vix descen- 

 dens, superne pone aperturam impressus; umbilicus dimidium 

 diametri fere aequans; apertura diagonalis, obauriformis; perist. 

 simplex, breviter reflexum, marginibus remotis, supero sub- 

 flexuoso. — Diam. maj. 10% — 11 V^, min. 9 — 10, alt. 3^2 — i 

 mili. (Cofl. Nr. 1059.) 



Helix stenostrepta Pfr. in Malak. BI. III. 1856. p. 260. 

 Habitat Tarapoto in Andibus Peruanis (Spruce). 



§. 125. 



1998. circulus Pfr. (Coll. IO6O. — Rv. n. 4iO. l. 82. — 

 Aegista Pfr. Vers. p. 136. — Iberus circ. |^Aegi.sta] 

 Ad. Gen. p. 212.) Mon.III. p 261. 



1999. H. scepasma Pfr. 



T. umbilicata, conoidea, solida, ruguloso-striata , opaca, 

 alba; spira regulariter conoidea, vertice acutiusculo; sutura 



