NATICA. 43 



except near the suture and at the base with orange-bi'own, the 

 latter sometimes evanescent in places, or obscurely banded. 



Length, 1-75-2-25 inches. 



China ^ Moluccas. 



N. Cumingiana^ Recluz (fig. 99), and 'i N. paZZiwm,Recluz, and 

 N. Di^aparnaudi^ Recluz (fig. 100), are synonyms. N. effusa^ 

 Swains, (fig. 92), is probably a pale-colored variet}". 



N. RAYiDA, Souleyet. PL 15, fig. 38. 



Deepl}' perspectiveh' urabilicated, globose, very solid, body- 

 whorl slightly obliquel}^ flattened above ; white, covered with 

 a thin, rough, hoi'n}^ j'ellowish epidermis, columellar callus very 

 strong, white. Length, 28 mill. 



Fayta, Peru (Soulej-et) ; St. Elena., W. Columbia (Cuming). 



N. ORiENTALis, Gmeliu. PI. 20, figs. 1, 2. 



Widel}' globose, plicate at the deep suture; umbilicus broad, 

 with a white central entering callus, aperture produced below ; 

 orange-brown, varying to j^ellowish white. 



Length, 1 "5-1 "7 5 inches. 



Singapore. 



It is N. ehurnea, Desh., N. siibfulva, Chemn. 



N. MAMiLLARis, Lam. PI. 18, fig. 74. 



Conic ovate, deeply umbilicated, with a broad entering callus, 

 flesh-brown or orange-brown, base and columellar callus white. 

 Length, 2 inches. 



West Indies, Caribbean coasts of Central and South. 



Arnerica, Bahia, Brazil. 

 It is N. brunnea, Linck,and N. Bahiensis, Recluz. N. p)cilliur)i 

 of the latter author (p. 42), which I have made a doubtful syno- 

 nym of N. Powisiana, may belong here ; it closely resembles 

 the present species, but the localit}' differs widely. 



N. OTIS, Brod. and Sowb. PI. 17, figs. 72, 70, 71 ; PI. 19, fig. 91 ; 

 PI. 12, fig. 2. 

 Conic ovate, yellowish white or light mouse-color, with a yel- 

 lowish or orange band at the suture ; umbilicus open, chestnut- 

 brown, together with the central entering callus ; interior of 

 aperture chestnut-color. Length, 1-1*75 inches. 



Gallapagos Is. to Ca2)e St. Lucas, L. Cal. 



