IIELIX §. 78. 79. 419 



Ilelix cmrmdata Binn. 'n\ Bost. joiun. III. p. 385. i. 19. f. 2. 

 Stenotrema avara Rofin. (teste Fer.) 



— — Hartm. Gast. I. p. 84. t. 22. 



Daedalochila avara Beck ind. p. 21. 

 /i Minor, anfr. 4'/2: diam. maj. 7, min. 6, alt. .^'A niill. (Spec.) 



Ilabitat in Louisiana et Floritla orientali (Say). 



Obs. Differt ab H. auriculala anfraclu ullimo anlice non soluto, opertury 

 non horizontaii, denle peristomatis dextro submarginali, etc. 



1088. H. Troostiana (Polygyra) Lea. 



T. umbilicato-perforata, discoidca, utrinque costulata, corneci, 

 superne planuiata, basi convexior; spira planiuscula; anfr. 5 '/2 

 planulati, penultimus subtus umbilicum latum planulatum for- 

 mans, ultimus antice deflexus, constiictus; apertura obliqua, 

 lunaris, coarctata; perist. acutum, angulatim reflexum, intus cal- 

 losum, marginibus callo, dentem linguiformem, subtriangularem 

 emiltente, junctis, basali dente submarginali, dextro dente latiorc, 

 profundo munito. — Diam. maj. 7'/^, min. 6'/^, alt. 3'/3 mill. (Goll. 

 Nr. 665.) — Diam. 0,4, long. 0,2". (Lea.) 



Polygyra Troostiana Lea obs. IL p. 1 07. t. 24. f. 1 19. 



Ileiix Troostia?ia Chemn. ed. IL Helix N. 390. t. 65. f. 21 —24. 



— .... Fer. hist. t. 69 D. f. 4. 

 Ilabitat in America boreali: Tennessee. 



Obs. Differt ab II. Dorfcuilliana umbilico irregulari, coslulis tolam testani 

 obducentibus, forma denlis parietis aperturalis et positione dentium peristonic'!- 

 tis, — ab H. texasiana sculptura , fornia etc. 



§. 79. 

 10S9. H. personata Lamarck. 



T. subobtecte pei^forata, depresso-globosa, coi^nea, opaca, 

 pubescens; spira vix elevata; anfr. 3 convexiusculi, ultimus antice 

 constrictus; apertura coarctata, angulato-trisinuata; perist. lale 

 replicatum , intus callosum, bidentatum, marginibus dente lingui- 

 formi, transverso fere junctis. — Diam. maj. 11, min. 9'/2, alt. 

 6 mill. (Coll. Nr. 666.) 



Helix personata Lam. Journ. d'hist. nat. t. 42. f. 1. 



— — (Helicodonfa) Fer. pr. 103. Hist. t. 51. f. I. 



— — Lam. 99. p. 92. ed. Dh. p. 73. 



— — C. Pfr. L p. 31. t. 2. f. 14. 



— — Guerin Iconogr. Moll. t. 6. f. 3. 



— — Rossm. I. p. 68. L 18. 



— — Chemn. ed. IL Heiix N. 382. t. 6 4. f. 27. 2 8. 



— isognomostomos Gmel. 158. p. 3621. (ex parte.) 

 Isognomostoma personatinn Fitzing. syst. Verz. p. 97. 



27* 



