i?4 AHCULARIA. 



N. ARCULARIA, Liiui. PI. T, figs. 9, 10. 



Lioht colored with ilark zone, or dark with a lioht zone ; shoulder 



noduled, with nsnally a rib-like fold arising from each nodule. 



Length, 1-1-25 inches. 



Philippines, Viti Isles. 



N. laficoxtato., Marrat (not figured), is ])rol)al)ly this species, 



not adult. 



N. SUU'IFEUA, A. Ad. PI. 7, fig. 11. 



Ash-color, banded with white, longitudinally subplicatcd, 



transversely ridged. Length, 1'25 inches. 



Algoa Bay. 



Probably only a variety of N. arcidaria: the single specimen 



known is abnormal in its appearance, and it is tlu'refore not easy 



to assign to it a definite place in the synonymy. 



N. PULLA, Linn. PL 7, figs. 12-14. 



The plications are much closer and more numerous than in 



N. arcutaria ; an incised revolving line sei)arates the shoulder 



extremity of these ribs, forming a row of nodules ; additional 



incised lines cross the entire surface, but are most conspicuous 



on the spire, and lower portion of the body whorl. 



Length, 1-1-35 inches. 



Red Sea, Java, Philij)piues. 



N liumphii^ Homln-. and Jacq. (fig. 13), is synonymous. That 

 N. puUa is itself identical with N. anudaria, is demonstrable from 

 the series of specimens before me. 



In N. ])lieata, Bolt., the longitudinal ribs are less and the 

 revolving lines more prominent ; another similar variation of 

 scul})ture has received the name N. Deshat/eiiii, Homb. and 

 Jac(i. (fig. 14). 



Subgciiu-! Arcularia, Link. 



X. GiBBOSULA, Linn. PI. 7, figs. 1-5-17. 



Light 3'ellowish or ash-color, banded, flecked, or blotched 

 with white or darker shades ; edge of callus frequently defined 

 on jjoth sides of the back by an orange-colored line ; callus 

 whitish ; within the aperture yellowish. Length, -75 inch. 



Mediterranean Sea. 



