HELIX §. 77. 78. 
417 
umbilicus angustus, pervius; apertura vix obliqua, lunaris; perist. 
breviter reflexum, simplex; paries aperturalis dente majusculo, 
lamelliformi, intrante et linea elevata, interdum obsoleta prope 
columellam munitus. — Diam, maj. 2’/*, ait. iVa mill. (Coii. 
Nr. 660.) 
Ildix labyrinthica Say in Philad. journ. I. P. 1. p. 124. 
— — (Ilelicodonta) Fd\ pi*. TH. Hist. l. 51 B. f. 1. 
— — 'Binn* in Bosh jouiHj.dll. p. 393.4; 26. f. 1. . 
— — Gow/rf report p. 184. f. 106. 
— — Pfr. Synib. II. p. 31. 
— ' — Chemn, ed. II. Helix N. 397. t. 66. f. 17 — 20. 
Habitat in America boreaii (in fungis ligni putridi: Say), Pennsyl- 
vania, Massacluisetts, Missouri (Gouid), Texas. 
§• 78. 
^/1034. H, aurxculata Say. 
T. rimato -perforata , superne planiuscula, subtus inflata, 
costulato-striata, lutescens vel fusca; anfr. 5/2 angusti, ultimus 
ad aperturam deflexus, disjunctus, subtus constrictus, scrobicu- 
latus; umbilicus planus, penullimuni anfractum modo monstrans; 
apertura subhorizontalis, auriformis, ringens, fere clausa; perist. 
continuum, marginibus plica oblonga intrante, superne excavata 
junctis, dextro intus lamella profunda munitus, cum basali late 
unituberculoso angulum subacutum formante. — Diam. maj. 13/2, 
min. 11 , ait. 7/4 mill. (Coli. Nr. 661.) 
Polygyra anriculaki Say in Philad. journ. 1. P. 2. p. 277. 
Helix aariculata (Ilelicodonta) Fer. pr. 98. Ilist. t. 50. f. 4. 
— — Lam, ed. Dh. 177. p. 1 12. 
— — Binn. in Bost. journ. III. p. 384. t. 19. f. 1. 
— — Chemn. ed. II. Helix N. 384. t. 65. f. 3. 4. 
Daedalochila auriculata Beck ind. p. 21. 
/^. Minor: Fer. hist. t. 50. f. 3. 
Habitat in Florida, prope St. Augustine (Say). 
10S5- H. ventrosula Pfr. 
T. rimato - perforata , depresso -globosa, tenuis , subtiliter 
striata, pellucida, corneo- albida; spira vix elevata; anfr. 5 vix 
convexiusculi, ultimus superne subangulatus, subito deflexus, 
basi inflatus, antice gibbus et valde constrictus; apertura perobli- 
qua, ringens; perist. acutum, late reflexum, marginibus vix con- 
niventibus, laminas elevatas in ventre anfractus penullimi angu- 
latim junctas, eminentibus, dextro lamina subperpendiculari, 
I. 27 
