



HELIX. 137 



tinuous, the parietal tooth linguiform, the upper lip tooth hook- 

 shaped at its lower termination, the basal tooth oblique ; horn color, 

 shortly hirsute. Diam. 8 mill. 



Sullivan's Island, So. Carolina; Georgia; New Orleans; Texas. 



H. POSTELLTANA, Bland. PI. 29, figs. 34-36. 



Whorls 5, costulate above, finely striate below, periphery sub- 

 angular; aperture auriform, much contracted, the margins joined by 

 a large, linguiform, entering tooth, right margin with a deep-seated 

 lamella terminating below in a hook, basal margin with a promi- 

 nent oblique lamella extending to the edge of the lip; brownish 

 horn color, thin, pellucid, lip white. Diam. 9*5 mill. 



Georgia, So. Car., Fla. 



H. ATJRIFORMIS, Bland. PL 29, figs. 37-39. 



Whorls 5 5-6, with moderate suture, ribbed-striate above, periphery 

 subangular, base convex and smooth, last whorl slightly deflected in 

 front and constricted behind the ear-shaped lip ; base showing nearly 

 two whorls with a deep groove revolving on their inner side and a 

 minute perforation; peristome continuous and expanded, parietal 

 tooth linguiform, with two lip teeth, of which the upper one is a 

 submarginal perpendicular lamella, and the basal one an oblique 

 fold; whitish or brownish horn color. Diam. 10 mill. 



Georgia, Alabama, Texas. 



H. UVULIFERA, Shuttle worth. PL 29, figs. 40-41. 



Whorls 5, with close ribs extending entirely across the base, which 

 is convex, periphery subangulated, last whorl deflected in front, and 

 scrobiculate behind the aperture ; aperture oblique, much contracted 

 by teeth, with the lip very much expanded, parietal tooth quadrately 

 linguiform, extending into the aperture, the upper lip-tooth situated 

 far within, the basal tooth an oblique plica; umbilical region sub- 

 carinate; horn color. Diam. 12 mill. 



Florida, Texas. 



H. florulifera, Reeve is a synonym. 



H. AURICULATA, Say. PL 29, figs. 42, 43. 



Whorls 5, costulate above and below, periphery slightly angulated, 

 last whorl suddenly deflected to the aperture, and very strongly 

 scrobiculate behind the middle of the right margin and also at the 

 base ; aperture oblique, auriform, the parietal tooth large, irregular, 

 projecting inwards and upwards, right margin with a perpendicular 



