46 NATICA. 



columellar callus chocolate-colored, broadly reflected, nearly 

 covering the similarly colored narrow umbilicus. 



Length, 30 mill. 



Singapore, Philippines. 



The synonyms are N. lupinus, Desh.; N. melanostoma, var. of 

 Ginelin, and N. cinnamomea, Menke. 



N. INTEMERATA, Phil. PL 18, fig. 83 ; PL 19, fig. 93. 



White, deeply umbilicated with a central obtuse entering 



callus. Length, 1/5 inches. 



Mazatlan. 



N. alabaster, Reeve (fig. 93), is identical. Carpenter thinks it 

 a variety of N. uber, VaL; this is not unlikely, but if so, it estab- 

 lishes a range of variation in form, umbilicus and callus, which 

 may reduce the white Mammas to a single species. 



N. CANDIDISSIMA, Le Guillou. PL 16, fig. 49 ; PL 19, fig. 95. 



Globosely neritoid, very solid, whorls polished, ivory-white; 

 callus broad, slightly entering the rather wide umbilicus. 



Length, 33 mill. 



Moluccas, North Australia. 



Is N. Julcesii, Reeve (fig. 95) = N. candidissima, Recluz. 



N. PHYTELEPHAS, Reeve. PL 19, fig. 97. 



Globosely ovate, with sharp spire and linear suture ; white, 

 under a very thin horny white epidermis showing indistinct 

 revolving lines ; umbilicus compressed, with a slight central 

 entering callus, the columellar callus above often obsoletely 

 divided by spiral depressions. Length, 1*25 inches. 



Australia. 



Perhaps not distinct from N. candidissima. 



N. UNIMACULATA, Reeve. PL 19, fig. 96. 



Pyriform ovate, compressly umbilicated ; white, under a very 

 thin horn}- white epidermis ; columellar callus white, with n 

 central projection entering the umbilicus, and chestnut-spotted 

 on the face. Length, 1-25-1-5 inches. 



Panama, Mazatlan. 

 N. ZOOLOGICA, Jousseaume. PL 20, fig. 3. 



Somewhat inflated, solid, white ; angulated around the widely 

 open umbilicus ; columellar callus rather narrow, chestnut tinged 

 below. Length, 5*7 mill. 



Ilab. unknown. 



