20 HELIX. 



H. DECRETA, Gassies. PI. 4, figs. 34, 35. 



Widely umbilicated, lenticular, lightly striate, light corneous 

 unicolored under a yellowish brown epidermis, scarcely shining; 

 whorls 5, convex, the last slightly descending, suture linear. 



Diam. 2 mill. New Caledonia. 



H.SUBCOACTA, Gassies. PL 4, figs. 48, 49. 



Widely umbilicated, striulate, reddish brown, epidermis some- 

 what wrinkled, hairy; whorls 5, regularly enlarging, the last 

 scarcely descending, suture deep. Diam. 3 mill. 



Ins. Art, N. Caledonia. 

 H. LAMBERT:, Gassies. PL 4, figs. 37, 38. 



Very widely umbilicated, depressed, subplane above, thin, 

 pellucid, sinning corneous, suture deep, surface longitudinally 

 and spirally striated ; whorls 5, rapidly increasing, rounded, the 

 last not descending in front, aperture brownish. Diam. 8 mill. 



Near Noumea, N. Caledonia. 

 H. INCULTA, Gassies. PL 4, fig. 51. 



Umbilicated, lenticular, subcarinate, a little convex, thin, 

 transversely flexuosely strigate, obscurely olivaceous under the 

 epidermis ; whorls 3J-4J, rapidly increasing, the last descending, 

 depressed above the middle, convex at base ; margins of peris- 

 tome joined by a thin parietal callus. Diam. 6 mill. 



New Caledonia. 

 H. RUSTICULA, Gassies. PL 16, figs. 71, 72. 



Widely, deeply umbilicated, strongly, obliquely, lamellarly 

 striated, reddish corneous or dark reddish; whorls 6, the last 

 depressed, the suture deep, carinated. Diam. 8 mill. 



Isle of Pines, New Caledonia. 



H. MELALEUCARUM, Gassies. PL 4, fig. 50. 



Narrowly umbilicated, convex, flexuosely striated, dirty 

 chestnut-color, apex yellowish, spire turbinate, suture profound; 

 whorls 4, convex, regularly increasing, the last descending, per- 

 iphery subcarinated, base flattened. Diam. 6'25 mill. 



New Caledonia. 

 H. DEMANI, Tapparone-Canefri. PL 4, figs. 39-41. 



Widely umbilicated, subobliquely closely costulate, corneous, 

 subpellucid, spire almost immersed ; whorls 4, regularly enlarg- 



