NATICA. 49 



N. LACTEA, Guilding. PL 16, figs. 54-57, 59, 52 ; PL 15, fig. 45 ; 

 PL 17, fig. 62; PL 19, fig. 85. 



Ovate, body-whorl a little slopingly flattened above, white, 

 nsuall}' clothed with a thin yellowish epidejiiiis ; umbilicus 

 moderate, partly filled Avith an entering callus which is often 

 indistinguishabl}^ joined to the callus above. Length, 1 inch. 



West Indies, Canary Islands, Brazil, Cape Horn. 



The form appears to be moderately constant, and the epidermis 

 is more persistent than in the other species ; otherwise than in 

 the latter particular it is undistinguishable from N. uber, of the 

 Pacific Coast of N. America. 



Tlie synonymy includes N. Carihsea, PhiL (fig. 56) ; N. nilida, 

 Donovan; N. uberina, d'Orl). (fig. 57) ; N. Pfeifferi, PhiL (fig. 

 45) = N. pes-ele/phanlis, Pfr., not Chemn. ; N. porcellana, d'Orb. 

 (fig. 55), from the Canary Islands; N. puella, Phil. (fig. 85), an 

 elongated variety, very lilvc the N. cora, of West Coast of So. 

 America ; N. jjuerilis, Gould (fig. 59), from the same region as 

 N. porcellana and N. Fhilippiana, N^'st (fig. 62) = N. acuta, 

 PhiL, preoccupied. 



Yar. ocHROSTOMA, R.ecluz. Fig. 52. 



Aperture and columellar callus light ochraceous, 



N. MAMiLLA, Linn. PL 16, figs. 46, 48; PL 15, fig. 43; PL 17, 

 figs. 65, 69. 

 Conicall}- ovate, smooth, white, shining. bod3'-whorl slopingly 

 flattened above ; columellar callus very thick, entirely covering 

 the umbilicus. Length, 1-5-2-5 inches. 



Uast Indies, Philippines, N. Caledonia, 



Central Polynesia, etc. 

 The sj'uonj'm}^ includes N. pyriformis (fig. 48) and N. inter- 

 media, of Kecluz ; N. virginea (fig. 69), and N. vestalis (fig. 43) 

 of Philippi, and N. alveata, Troschel (fig. 65), said to have been 

 collected on the Peruvian coast. 



N. ALBULA, Recluz. PL 16, fig. 47. 



Depressly globose, subventricose, whorls somewhat squarely 

 convex, polished, obsoletely grooved-striated, white ; columella 

 densely callous, filling the umbilicus. Length, 2 inches. 



Philippines. 

 Perhaps only a variety of N. mamilla, Linn. 

 4 



