HELIX. 21 



DIAM. maj. 12, min. 11 ; alt. 7 mill. 

 Hal). In Insulis parvis " Long Keys," sinu dicto 

 " Sarazota " Florida Austr. (Rugel.) 



Obs. Specimina numerosissima examinavi. Proxime 

 H. auriculatse affinis, sed textura, colore, ac apertura 

 minus coarctata, peristoinateque minus producto satis 

 distincta. H. Ariadne Pfr. in Chemn. ed. 2, tab. 65, 

 f. 29-31, etiam affinis, at differt figura testae tantum 

 rimata sine vestigio perforationis. Nonien specificum 

 ab apicula lamellae marginis dextri peristomatis, uvulae 

 humanse hand dissiniili, assumptum, sed character hie in 

 omnibus speciebus affinibus plus minusve obvius est. 



The preceding six species were described in a series 

 of pamphlets, entitled " Diagnosen neuer Mollusken." 

 These are found in No. 2. 



HELIX BARBIGERA, REDFIELD, 



Testa imperforata, acute carinata, lenticular!, tenuiscula, corneo- 

 fusca, epidermide superne striis asperata, quse ad suturam et cari- 

 nam in ciliis products sunt ; basi convexa ; spira convexinscula ; 

 anfractibus 5^, subplanis, ultimo subit6 paululum deflexo ; aper- 

 tura perobliqua, transversa, auriformi, dente modico linguiformi 

 oblique intrante in toto pariete aperturali coarctata ; peristomate 

 calloso, marginibus incrassatis et reflexiusculis, basali subsinuato, 



integro. 



SHELL imperforate, sharply carinate, rather thin, dark 

 horn-colored or brown ; the upper surface has the epi- 



