120 AURICTJLID^. 



columellar plait oblique, rather twisted; peristome simple; 

 right margin dilated forwards in the middle ; columellar margin 

 extremely short. Length 3, breadth 1^ mill. 



Leuconia occidentals, Pfr. in Maldk. Bl. 1854, p. 155 ; Syn. 

 Auric, n. 169 ; Mon. Auric, p. 157. 



H and A. Adams, Gen. rec. Moll. ii. p. 248. 



Hob. Sea-coast near Cardenas, Isle of Cuba (Gundlach). 



5. Leuconia? Sayi. 



Shell minute, conic-ovate, shining, horn-coloured, striated; 

 spire pointed, broadly conic ; whorls six, moderately convex ; 

 aperture oblong ; columella furnished with two plaits. Length 

 2i, breadth li lines (Kiist.). 



Auricula Sayi, Kiister, Auric, p. 42. t. 6. f. 14, 15. 

 Leuconia Savi, H. and A. Adams in Proc. Z. S. 1854, p. 36. n. 2 ; 

 Gen, rec. Mall. ii. p. 248. 

 Pfr. Syn. Auric, n. 170 ; Mon. Auric, p. 157. 



Hah. United States of America. 



6. Leuconia succinea. 



Shell imperforate, fusiformly ovate, thin, smooth, diaphanous, 

 shining, amber-coloured ; spire conic, rather pointed ; suture 

 indistinctly bordered ; whorls five, rather flattened, the last de- 

 scending anteriorly, scarcely longer than the spire, attenuated 

 at base ; aperture oblique, narrowly semiovate, furnished with 

 three plaits ; upper plait parietal, lamelliform, entering horizon- 

 tally ; second plait smaller, oblique, dentiform like the colu- 

 mellar plait, with which it is arcuately united ; peristome simple, 

 straight, with the right margin arched slightly and regularly. 

 Length 4£, breadth 2 mill. 

 Leuconia succinea, Pfr. in Maldk. Bl, 1854, p. 156 ; Syn. Auric. 



n. 171 ; Mon. Auric, p. 157. 



H and A. Adams, Gen, rec. Moll, ii. p. 248. 

 Hah. Near Cardenas, Cuba (Gundlach). 



12. CAEYCHIUM, 0. F. Midler. 



Shell pupiform, thin, glassy, with few whorls ; aperture rather 

 ovate ; columellar plait single, tooth-shaped or obsolete ; body 

 of the penultimate whorl furnished with one or two teeth ; 

 peristome expanded, with distant margins ; right margin bear- 

 ing sometimes a single tooth within. 



Carychium, O. F. Midler, 1774, Hist. Verm. ii. p. 125 ; 1776, 

 y Zool. Dan. Prodr. p. xxix. 



