42 NAT1CA. 



Believed to have been obtain eel from the stomach of codfish. 

 If the original figure is correct, this species appears to have 

 escaped all other collectors. 



Section PAYRAUDEALTTA, Bucq., Dautz. & Dollf., 1883. 

 N. INTRICATA, Donovan. PL 6, figs. 20, 21. 



Largely excavated umbilieated, with two funicular ridges ; 

 purple-white, with five or six white bands bearing angular or 

 sagittate chestnut markings, interior chocolate-tinged. 

 Length, 15-22 mill. 



Azores, Southern Europe, Mediterranean Sea. 

 N. fasciata, Risso, N. grisea, Requien, N. Valenciennesii, 

 Payr., are synonyms. 



Section MAMMA, Klein, 1753. 

 N. DEIODOSA, Reeve. PI. 15, fig. 36. 



Depressed ovate, spire minute, body-whorl flattened beneath, 

 the umbilicus filled by a heavy white callus ; whorls smooth, 

 striate, pale straw-color. Length, 1 - T5 inches. 



Australia. 

 Differs in form and umbilicus from N. aurantia, Lam. 



N. AURANTIA, Lam. PI. 15. figs. 39-41, ST. 



Thick, ponderous, body-whorl conically sloping above and a 

 little constricted in old specimens ; orange-brown ; callus heavy, 

 ivory-white, in adults usually entirely filling the umbilicus. 



Length, 2 inches. 



Singapore, Moluccas, Philippines, Australia, N. Caledonia. 



Var. MITTREI, Hombr. and Jacq. (fig. 3T), is a specimen in which 

 the umbilicus is not entirely filled by callus ; N. ciirina, 

 Phil. (fig. 41), appears to be a similar form. 



Var. STRAMINEA, Recluz. Fig. 40. 



Color straw-yellow, varying to yellowish white. 



N. POWISIANA, Recluz. PL 15, fig. 42; PL 19, fig. 92; PL 20, 



-figs. 99, 100. 



Openly obliquely umbilicated, columellar lip with a heavy 

 w r hite callus overhanging a central broad entering funiculum ; 

 whitish or yellowish white, usually overlaid on the body-whorl, 



