110 
HELIX §. 12. 
convexiusculi , rapide accrescentes, ultimus latus, depressus, pe- 
ripheria rotundatus, antice non descendens; apertura lunato- 
rotundata; perist. simplex, acutum, margine supero antrorsum 
arcuato, columellari non reflexo. — Diam. maj. 15 '/ 2 , min. 13, 
ait. oYa mill. (Coli. Nr. 144.) 
Helix vitrina Wagner in Sjnx p. 25. 
— — Chemn, ecl. n. Helix N. 516. t. 84. f. 1 4 — 1 6. 
— circumplexa Fer. hist. p. 19. t. 84. f. 5. 6. 
— valvaeformis Nyst in schcd. 
Solarium imperforatum Spix test. bras. t. 17. f. 6. 
HeliceUa imperforata Beck ind. p. 7. 
/?. Junior: H. nana Wagn. 1. c. — Solarium pygmaeum Spi.\ t. 17. f. 7. 
Habitat in Brasilia australi. 
2S0. H. ammonifoFtnis Orbigny. 
T. late umbilicata, orbiculato-concava, depressa, tenuis, dia- 
phana, albido-grisea, sublaevigala; spira subiinpressa; anfr. 5 de- 
pressi, ultimus perdilatatus ; apertura oblique lunato-ovalis; perist. 
simplex, acutum, marginibus conniventibu>j»^^pero antrorsum 
curvato. — Diam. maj. 14, min. 12, ait. 4 railL^Mus. Cuming.) 
Helix ani7no7iiformis (HeliceUa) Orb. syuops. p. 5. 
— — Orb. voy. p. 2 48* t. 2 6. f. 10—13. 
— — Desh. in F6r. hist. p. 9, t. 69 F. f. 1. 
Habitat in provincia Yungasensi Boliviae. 
Obs. Differt ab H. vitrina umbilico multo latiore , etc. 
2S1. H. aulacospira Fft*. « 
T. late umbilicata, depressa, discoidea, tenuis, irregulariter 
et leviter malleata, lineis impressis, concentricis, confertis regu- 
lariter sulcata, lutescenti-cornea; spira plana; anfr, 4/2 depressi, 
celeriter accrescentes, ultimus non descendens; umbilicus latus, 
perspecti vus ; apertura subverlicalis, oblique lunato-ovalis; perist. 
simplex, tenue, margine columellari non reflexo. — Diam. maj. 
12, min. 10, ait. 4/2 mili. (Mus. Cuming.) 
Helix atdacospwa Pfr. in Proc. Zool. Soc. 1846. p. 37. 
Habitat. . . ? 
282. H. concolor Ferossac. 
T. umbilicata, discoidea, laevigata, substriata, fulva, castaneo 
alternatira strigata ; spira plana ; sutura linearis ; anfr. 4 celeriter 
accrescentes, ultimus major, superne depressus, J^asi convexior; 
apertura lunato-subcircularis; perist. simplex, acutum, margini- 
bus subapproximatis. — Diam. maj. 14, min. 12, ait. 6 mill. 
