6 HELIX. 



(Section SAGDA, Beck, 1837). 

 H. ALLTGANS, C. B. Adams. PI. 1, figs. 1-3. 



Imperforate, globosely conoidal, white, under a brownish- 

 yellow epidermis, incremental striae regular, stronger on the 

 spire than on the body-whorl ; whorls 8, narrow, aperture with a 

 deep-seated strong basal lamella. Diam. 1-25 inches. 



Jamaica. 



The synonyms are H. epistylium, Pfr. (not Miiller), H. alveo- 

 lata, Beck ? 



H. EPISTYLIOIDES, Fe'r. PI. 1 , fig. 4. 



Solid, imperforate, obliquely costate, white, under a corneous 

 yellow epidermis ; whorls 9, the last scarcely wider than the 

 others, obsoletely angulated, aperture with an evanescent deep- 

 seated revolving basal lamella. Diam. 1 inch. 



Jamaica. 



H. alveolata,jim., Beck, is referred here by Pfeiffer. 



H. CONNECTENS, C. B. Adams. PI. 1, fig. 5. 



Imperforate, hemispherical, white under a corneous epidermis, 

 somewhat rugosely sculptured by incremental striae ; whorls 9, 

 very narrow, a little convex, the last slightly convex below, 

 concave in the umbilical region ; aperture rather narrow, trans- 

 verse, the basal lamella strong, acute, deep-seated. Diam. 1 inch. 



Jamaica. 

 H. JAYANA, C. B. Adams. PI. 1, figs. 6, 7. 



Imperforate, conoidal, smoothish, lightty striulate, white under 

 a corneous epidermis, spire conoidal, obtuse ; whorls 9j, flattened, 

 the last subangulated, base deeply excavated ; columella short, 

 somewhat oblique, basal lamella deep-seated. Diam. 1 inch. 



Jamaica. 



This is H. Cookiana of Pfr. (not Gmel.),in part, H. alligans, 

 Reeve (fig. 7). 



H. AUSTRALIS, Chemn. PI. 1, fig. 8. 



Imperforate, solid, obliquely striate above, light yellowish 

 corneous, spire somewhat acute, suture impressed, margined; 

 whorls 8, a little convex, slowly increasing, periphery very 

 obsoletely angulated, base more lightly striated, globose, 

 impressed in the middle, aperture almost vertical, with an 



