HELIX. 99 



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

 with the convex base of H. JBoothiana, the umbilicus wider than 

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

 peraffinis. The shell figured is not fully grown. 



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



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

 whorls 4J, 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 4i-5, 

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



Jamaica. 



If. 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. IMMUNDA, Adams. PI. 19, figs. 37, 38. 



Moderately umbilicated, thin, irregularly costulate-striate, scarcely 

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

 whorls 5J, 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. 



