112 HELIX-LUCERNA. 



bronni, larger and browner on the base. H. valida is similar, but 

 the body-whorl is not so depressed as in sloaneana. The teeth are 

 not nearly so large in this shell as in H. sinuata, nor is the inner 

 groove behind the peristome so long. 



H. BRONNI Pfeiffer. PI. 38, figs. 78-80. 



Imperforate, globose-depressed or subtrochoidal, solid, opaque, 

 shining, upper surface deep chestnut brown, periphery white, base 

 white or yellowish except for a brown fascia revolving below the 

 periphery ; surface granulate (under a lens), the granulation usually 

 nearly or entirely effaced, especially above ; spire conoidal, obtuse, 

 elevated or depressed ; apex planulate, whitish ; w r horls slightly 

 convex, slowly widening, the last scarcely wider than the penulti- 

 mate ; whorls 5 to 5i, the last deeply deflexed anteriorly, rounded 

 (or faintly keeled) at the periphery, deeply scrobiculate behind the 

 peristome ; aperture subhorizontal, transverse ; -peristome broadly 

 expanded, thickened, basal margin reflexed, widening toward the 

 insertion, adnate over the umbilicus, bearing within four teeth, reg- 

 ularly decreasing in size from the outer to the inner one ; evenly 

 spaced, the outer two connected at their bases. Lip white and 

 brown ; its upper termination continued in a heavy callous half- 

 way across the parietal-wall toward the axis. 



Alt. 13-16, diam. 24 mill ; alt. 16, diam. 26 mill. 



Jamaica. 



H. bronni PFR. Monogr. i, p, 305 ; Conchyl. Cab. p. 109, t. 15. f. 

 9, 10 ; 1. 153, f. 4. REEVE, f. 241. 



Closely allied to H. sloaneana, but smaller, more elevated, with 

 shorter aperture, more thickened and broader basal lip. 



H. STRANGULATA, C. B. Adams. PL 36, figs. 42-46. 



Imperforate, globose, solid, opaque, dull, chocolate-brown, base 

 usually paler ; surface microscopically granulated all over ; spire 

 convex, low, obtuse ; apex planulate ; sutures impressed ; whorls 5, 

 convex, slowly widening, the last subglobose, rounded at the per- 

 iphery, deeply deflexed anteriorly, indented behind the peristome by 

 two curved converging furrows ; aperture subhorizontal, transverse ; 

 peristome broadly expanded, soiled Avhitish, basal margin reflexed, 

 adnate over the umbilicus, bearing within four tortuous lamellar 

 teeth, the inner one very close to the insertion. Parietal-wall 

 traversed by a heavy callous continued downward from the upper 

 termination of the peristome. Alt. 15, diam. 24 mill. 



Jamaica. 



