HELIX. 99 



This species has a spire somewhat depressed as in H. peraffinis, 

 with the convex base of H. Boothiana, the umbilicus w r ider than 

 the latter and the aperture not so high but narrower than in 

 peraffinis. The shell figured is not fully grown. 



H. INCONSPICUA, Adams. PI. 19, fig. 33. 



Moderately umbilicated, striulate, thin, subhyaline, suture deep ; 

 whorls 4i, a little convex, the last not descending, base inflated, 

 subcompressed towards the umbilicus. Diam. 4*3 mill. 



Jamaica. 

 H. BREVIOR, Adams. PI. 19, fig. 34. 



Moderately umbilicated, diaphanous, whitish; whorls 4?-5, 

 scarcely convex, the last not descending. Diam. 5'5 mill. 



Jamaica. 



H. depressa, Adams, is a synonym. 



H. SINCERA, Adams. PI. 19, fig. 35. 



Moderately umbilicated, thin, striulate, waxy, white ; whorls 4 , 

 somewhat convex, the last narrow. Diam. 4 mill. 



Jamaica. 

 H. UMBRATILIS, Guppy. PI. 19, fig. 36. 



Deeply umbilicated, distinctly, regularly striated, diaphanous, 

 corneous or whitish ; whorls 5 -6, slowly increasing. 



Diam. 1*5 mill. 



Trinidad, W. I. 

 H. IMMUXDA, Adams. PI. 19, figs. 37, 38. 



Moderately umbilicated, thin, irregularly costulate-striate, scarcely 

 shining, diaphanous, light corneous or greenish, suture deep ; 

 whorls 5?, convex, tumid at the suture, the last scarcely des- 

 cending, periphery obsoletely angulated. Diam. 12'5 mill. 



Jamaica. 

 H. RUFULA, Pfr. PI. 19, fig. 39. 



Narrowly umbilicated, thin, closely costulate, diaphanous, a little 

 shining, brownish, suture impressed ; whorls 4J, a little convex, the 

 last not descending, base a little flattened. Diam. 10'5 mill. 



Jamaica. 

 H. DIMINUTA, Adams. PI. 19, figs. 40, 41. 



Widely umbilicated, thin, rather closely plicately ribbed, dia- 

 phanous, greenish- or corneous-white, suture 'deep ; whorls 4, con- 

 vex, subequal, the last not descending, base somewhat flattened. 



Diam. 3 mill. 



Jamaica, Grenada. 



