20 NATICA. 



N. CHINENSIS, Lam. PL 3, figs. 53, 54. 



Umbilicus wide, nearly filled by a wide central entering white 

 callus, leaving a semicircular groove terminating in a narrow 

 deep perforation above ; white, witli obliquely subquadrate 

 chocolate-colored spots, arranged in four or usually five revolving 

 series, the second and fourth series often conspicuously larger. 



Length, 1 inch. 



China, Singapore, Philippines, Viti Islands. 

 This is N. onca, Bolten, of Adams' Genera, and N. Aimei, 

 Jousseaume (fig. 54). 



N. FORSKALII, Chemn. PL 3, fig. 55. 



Openly perspectively urnbilicated, plicately striate next the 

 suture ; white, longitudinally strigate with chestnut, the striga- 

 tions interrupted, forming two narrow white bands, base un- 



colored. Length, 1-1*5 inches. 



Mauritius. 



Has been considered by some conchologists a var. of N. rufa, 

 Born, but the latter is unicolored, interrupted by bands and at 

 the base, and the umbilicus has a distinct entering ridge. 



N. MAHEENSIS, Dufo. PL 3, fig. 56. 



Strongly plicately wrinkled next the suture ; umbilicus half 

 filled with a strong white central entering callus; whitish, with 

 two broad bands of oblique chestnut blotches. Length, 28 mill. 



St't/chvlles Is. 

 N. KAYNOLDIANA, Becluz. PL 3, fig. 57. 



Rnther thick, smooth, umbilicus partly covered on the upper 

 part by the white oolumellar callus ; orange-fulvous, sometimes 

 unicolored, more frequently more or less covered by chocolate 

 reticulations, often with an irregular hand-like interruption on 

 the periphery. Length, 1 inch. 



Ceylon, Singapore, Viti /x. 



Sowerby's figure is of a shape not oh:ir:uM eristic of this species, 

 the spire being too elevated. 



N. CANKKXA, Liiiii. IM. 4, figs. 58-61. 



Cmbilicus largely filled with a white entering callus, leaving 

 a semicircular rimation; chestnut-brown, with yellowish brown 

 revolving zones, ;md longitudinal xigztig In-own streaks, beeoin- 



