20 NATICA. 



N. CIIINENSIS, Lara. 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, 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 jV. onca, Bolten, of Adams' Genera, and N. Aimei, 

 Joiisseaume (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 1111- 



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 ridgo. 



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



Strongty 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. 



Seychelles Is. 

 N. RAYNOLDIANA, Eecluz. PL 3, fig. 51. 



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 periphery. 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. CANRENA, Linn. PL 4, figs. 58-61. 



LTmbilicus largely filled with a white entering callus, leaving 

 a semicircular rimation ; chestnut-brown, with yellowish brown 

 revolving zones, and longitudinal xigzng brown streaks, becom- 



