HELIX §. 77. 78. 417 



umbilicus angustus, pervius; apertura vix obliqaa, lunaris; perist. 

 brevitcr reflexum, simplex; paries aperturalis dente majusculo, 

 lamelliformi , intrante et linea elevata, interdum obsoleta prope 

 columellam munitus. — Diam. maj. Sy?, alt. iVs mill. (Coll. 

 Nr. 660.) 



Ilelix labyrinthica Say in Philad. journ. I. P. 1. p. 124. 



— — (Helicodonta) Fer. pr. M1. Hist. t. 51 B. f. -1. 



— — Binn. in Bost. journ. m. p. 393. t. 26. f. 1. 



— — Gould repovtp. 18 i. l \ 06. 



— — Pfr. Symb. U. p. 3 1 . 



— — Che7nn. ed. U. Helix N. 397. t. 66. f. 17 — 20. 

 llabitat in America boreali (in fungis ligni putridi: Say), Pennsyl- 

 vania, Massachusetts, Missouri (Gould), Texas. 



§• 78. 

 10S4. H. auriculata (Polygyra) 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, penultimum 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. ISy^, 

 min. 11 , alt. 7/3 mill. (CoII. Nr. 661.) 



Polygyra auriculata Say in Philad. journ. 1. P. 2. p. 277. 

 Helix auriculata (Helicodonta) Fer. pr. 98. Hist. t. 50. f. 4. 



— — Lam. ed. Dh. 177. p. 1 12. 



— — Binn. in Bost. journ. III. p. 384. t. 19. f. 1. 



— — Chemn. ed. U. Helix N. 38 4. t. 65. f. 3. 4. 

 Daedalochila auriculata Beck ind. p. 21. 



/3. Minor: Fer. hist. t. 50. f. 3. 



Habitat inFlorida, prope St. Augustine (Say). 



1085. H. ventrosula Pfr. 



T, rimato - perforata , depresso-globosa, tenuis, subtiliter 

 striata, peUucida, 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 penultimi angu- 

 latim junctas, emittentibus, dextro lamina subperpendiculari, 

 I. 27 



