NAT 1C A. 49 



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

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



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

 usually clothed with a thin yellowish epidermis ; umbilicus 

 moderate, partly filled with an entering callus which is often 

 in distinguish ably 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 X. America. 



The synonymy includes N. Caribaea, Phil. (fig. 56) ; N. nitida, 

 Donovan ; N. uberina, d'Orb. (fig. 57) ; N. Pfeifferi, Phil. (fig. 

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

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

 elongated variety, very like the N. corn,, of West Coast of So. 

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

 N. porcellana and N. Philippiana, Xyst (fig. 62) = N. acuta, 

 Phil., preoccupied. 



Yar. OCHROSTOMA, Recluz. 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. 



Conically ovate, smooth, white, shining, body-whorl slopingly 

 flattened above ; columellar callus very thick, entirely covering 

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



East Indies, Philippines, N. Caledonia, 



Central Polynesia, etc. 



The synonymy includes N. pyriformis (fig. 48) and N. inter- 

 media, of Recluz ; 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. 



X. 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 



