20 NATICA. 



N. CHINE^fSIS, Lam. PI. 3, figs. 53, 54, 



Umbilicus wide, nearly filled b}' a wide central entering white 

 callus, leaving a semicircular groove terminating in a narrow 

 deep perforation above ; white, with 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. PI. 3, fig. 55. 



Openly perspectively umbilicated, 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. 



Mau7'itius. 



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. Maiieensts, Dufo. PI. 3, fig. 56. 



Stronglj"^ plicatel}' 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. 



Seychelles Is. 

 N. Raynoldiana, Recluz. PI. 3, fig. 5T. 



Rather thick, smooth, umbilicus partly covered on the upper 

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

 unicolored, more frequently more or less covered by chocolate 

 reticulations, often with an irregular band-like interruption on 

 the peripher}^ Length, 1 inch. 



Ceylon, Singapore, Viti Is. 



Sowerby's figure is of a shape not characteristic of this species, 

 the spire being too elevated. 



N. oanrena, Linn. PI. 4, figs. 58-01. 



Umbilicus largely filled with a white entering callus, leaving 

 a semicircular rimation ; chestnut-brown, with 3'ellovvisli brown 

 revolving zones, and longitudinal zigzng brown streaks, becom- 



