6 HELIX. 



(Section SAGDA, Beck, 1S37)> 



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



Imperforate, globosely conoidal, white, under a brownish- 

 yellow epidermis, incremental stride 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 synon} T ms are H. epistylium, Pfr. (not Miiller), H. alveo- 

 lata, Beck? 



H. EPISTYLIOIDES, Per. 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. alveolatq,j\m., Beck, is referred here by Pfeiffer. 



H. CONNECTENS, C. B. Adams. PL 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. PL 1, figs. 6, T. 



Imperforate, conoidal, smoothish, lightly striulate, white under 

 a corneous epidermis, spire conoidal, obtuse ; whorls 9^-, flattened, 

 the last subangulated, base deeph* 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. PL 1, fig. 8. 



Imperforate, solid, obliquely striate above, light 3^ellowish 

 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 



