rather \vidr, dilated and s.mr\vhat efl'usr at l>a~e ; lip seare< Iv pro- 

 duced above the flat vertex, in th- rent.-r of \\hieh it i~ iiiH-rted; 

 eolumella derplv arcuate, rallmis, rellexed. Alt. 12, diam. 8 mill. 



* 



mil: 



11. mullein SMITH, Ann. Mag. N. H. (4), ix, 1872, |. 849, 



This species is remarkable for its short squarish form, the i 

 lar malleation, the reflected colunu'lla. and flattened vertex. Here 

 and there are longitudinal depressions, giving the shell a some- 

 what wrinkled appearance (&). 



H. PERPLEX A Smith. Unfigured. 



Shell ovate-cylindrical, bluish-white, pellucid, above and below 

 opaque, milky, and transversely distantly striated, smooth in the 

 middle, striated with growth -lines. Vertex deeply depressed, sub- 

 perforate in the middle ; aperture narrow, slightly produced above 

 the vertex, the base somewhat wider ; columella simple, slightly re- 

 flexed. Alt. 14, diam. 7 mill. (5.). 



Habitat unknown. 



H. perplexa SMITH, Ann. Mag. N. H. (4), ix, p. 350, 1872. 



This species has much of the aspect of the genus Atys ; but is 

 without the sinuosity of the labrum at the vertex, and is there 

 slightly perforated. The superior striae are about seven in number, 

 the inferior about twice as many (&). 



H. ROTUNDATA A. Adams. PL 41, fig. 16. 



Shell roundly ovate, thin, horny, semipellucid, rounded at both 

 ends, longitudinally striated under the lens, with very fine trans- 

 verse lines; outer lip equally arched (Ad.). 



Habitat unknown. 



B. (H.) rotundata A. AD., in Thes. p. 583, pi. 104, f. 105. flum- 

 inea rotunda SOWB., C. Icon. f. 9. 



Sowerby drops a syllable from this name. 



H. SERICA Smith. Unfigured. 



Shell rotundly ovate, very thin, pellucid, whitish, slightly shining, 

 finely and closely striated transversely and with growth lines ; aper- 

 ture rather wide, produced somewhat above the vertex, dilated at 

 base; columella little thickened, spirally twisted; umbilical region 



