38 



SucciNEA coNCORDiALis. Testa tenui, lucida, oblique ovata, 

 acuminata, reflexa, cerea et ad apicem rubicunda, leviter striata 

 et lineis obscuris volventibus insculpta ; anfr. 3 perobliquis, su- 

 pernis parvulis, tumidis, sutura profunda ; apertura ovata, trien- 

 tes dufe longitudinis testse sequante, basi rotundata ; columella 

 arcuata, absque plica, leviter arrecta ; intus micante. Long ^, 

 lat. ^ poll. Hab. near Lake Concordia. 



At first view, this might be mistaken for Limnea columella. 

 Its color and texture are like S. amphibia, from which it differs 

 chiefly in the slight upturning of the edge of the columellar lip, 

 the presence of the obscure revolving lines and the ruddy apex. 



Helix selenina. Testa parva, discoidea, pallida, tenuissima, 

 exiliter striata, diaphana ; anfr. 5 convexis, ultimo subangulato, 

 sutura impressa ; basi convexo, umbilico infundibuliformi perfo- 

 rate ; apertura angusta, lunari, labro simplici. Diam. -} poll. 

 Hab. Georgia and Florida. 



About the size of H. arborea, distinguished by its delicacy, its 

 pale, opaline color, its small well-defined and deep umbilicus, its 

 discoidal spire and its narrow aperture. Its color and superior 

 aspect may be compared with H. lineata. 



Helix rotula. Testa parva, discoidea, pellucida, nitida, 

 electrina, H. suppresses siniili, umbilico infundibuliformi profundo 

 perforata ; anfr. 6^, vix convexis, striis distantibus superne im- 

 pressis, sutura marginata ; apertura semilunari, labro simplici, 

 baud incrassato. Diam. \ poll. Hab. Tennessee. 



This delicate little species has the size and color of H. inden- 

 tata, and is similarly striated above ; the whorls are numerous 

 and closely convoluted like H. suppressa, but it has a larger 

 umbilicus, like H. las?nodon, and has no thickening or plate 

 within the aperture. 



Helix maxillata. Testa parva, globoso-lenticulari, pallide 

 castanea, solidula, H. hirsutcB simili : apertura lineari, labro re- 

 fiexo, prseter emarginationem inconspicuam dente obsoleto divi- 

 sam integro, fauce lamellam sicut maxillam pone labrum ge- 

 rente ; lamella columellari recta, superne bifurcata. Diam. ^ 

 poll. Hab. Tennessee. 



This shell, which is smaller and somewhat more globose than 



