— 195 — 



subcus concolor; anfr. 7, Icntissime accresccntcs, vix convexius- 

 cuU, ultimus subtus convexus, ad unibilicum subcxcavatus ; aper- 

 tura obliqua, luuaris ; perist. simpIex, acutum. 



Diam. maj. 7V2» ""«• ^Vi'y Alt. 3 mill. 

 Hab. In Tennes«ee, Amer. sept., specimina pauca legit Rugel. 

 Obs, Z. (iemissae Binn. affiiiis, sed testa depressiore, umbilico 



latiore, et pra?sertim absentia calli aibi opaci in fundo anfrac- 



tu8 Ultimi distinctissiraa. 



Zonites ni&cileiita Shuttl. 



Testa lata et perspective umbilicata, depressa, arctispira, cor- 

 iieo-flavescens , diaphana, superne striata, vix nitida, subtus lae- 

 viuscula, nitida, concolor j spira depressissime-rotundata, obtusa ; 

 anfr. 8, lentissime accrescentes, subconvexi, ultimus in fundo callo 

 albo subdentiformi profunde intrante praeditus ; apertura lunari- 

 semicircuiaris ; perist. simplex, acutum. 



Diam. maj. 8, min. TVs; Alt. 3 mill. 

 Hab. In Tennessee orientali semel legit Rugel. 

 Obs. Species instruetiva, forma cohortem „Patula" Held, callo 



dentiformi „Gastrodonta" Albers (Helix suppressa Say etc.), 



testae textura autem Zonitis sectionem „Hyalina Fer." referens. 



Helix mordax Shaltl. 



Testa late et perspective umbilicata, depressa, sublenticularis, 

 carinata, tenuis, luteo-cornea, strigis rufis interruptis fasciatim 

 ornata, costis validis flexuosis remotis utrinque eximie asperata; 

 anfr. öVz? plani ; apertura perobliqua angulatim lunari-ovalis ; pe- 

 rist, simplex, acutum. 



Diam. maj. 18, min. i6; Alt. 6 mill. 

 Hab. In mont. Carolinae sept. specimina ultra 13 legit Rugel. 

 Obs. H. alternata) valde afflnis, sed costis validioribus, ad 1 mill. 

 inter se remotis, distincta. H. Cumberlandiana Lea (forsan 

 mere forma monstruosa}, quäcum carina congruit, differt (ex 

 icone) testa tautum tenuiter striata nee costata. 



Helix Heldreichi Shattl. 



Testa umbilicata, depressa, granulato-striatula, pilis spareis 

 rigidis asperata, cerea, fascia unica, pallide fusca ornata j anfr. 4V2> 

 planalati, ultimus antice subito deflexus ; apertura fere circularisj 

 perist. expansum, subreflexum, intus sublabiatum, continuum, non 

 solutura. 



Diam. maj. 19, min. 15 5 Alt. 8 mill. 



Syn. Helix ctjclolabris Pf. Mon. Hei. 1, p. 368, NO 955 (non Desh.). 

 „ „ „ Chemn. ed. 2. tab. 79, f. 15—16. 



„ Heldreichii Shuttl. in Sclied. et Pf. Symb. 3, p. 78. 



