NATICIDAE 191 



Subjainily NATICINAE 



Genus Natica Scopoli 1777 



Subgenus Naticarius Dumeril 1806 



Natica canrena Linne Colorful Atlantic Natica 



Plate 5I 



North Carolina to Key West and the West Indies. 



I to 2 inches in length, glossy-smooth, except for weak wrinkles near 

 the suture. Color pattern variable; sometimes with axial, wavy, brown lines 

 and with 4 spiral rows of arrow-shaped or squarish brown spots. Umbilicus 

 and its large round, internal callus white. Exterior of hard operculum with 

 about 10 spiral grooves. Uncommon in eastern Florida; common in the West 

 Indies. 



Natica livida Pfeiffer Livid Natica 



Plate 22-0 

 Southeast Florida, Caribbean and Bermuda. 



% inch in length, glossy-smooth, exterior lead-gray with vague, spiral, 

 darker-gray bands. Aperture and columella brown; callus which almost fills 

 the umbilicus characteristically dark to light chocolate-brown. Moderately 

 common on intertidal sand flats. Do not confuse with Folinices duplicatus, 

 which is much flatter and has a corneous operculum, but which also has a 

 brown to purplish brown callus. 



Subgenus Cryptonatica Dall 1892 

 Natica clausa Broderip and Sowerby Arctic Natica 



Figure 43b 



Arctic Ocean to North Carolina. Arctic Ocean to off southern Cali- 

 fornia. 



I to I % inches, in length, fairly thin, smooth, yellow-white, with a 

 smooth, gray to yellowish-brown periostracum. Umbilicus sealed over by a 

 small, flat callus. Operculum, calcareous, thin, slightly concave, smooth, 

 white and paucispiral. Commonly dredged in moderately deep water, and 

 occasionally found intertidal north of Massachusetts. The sand-collar egg- 

 case has smooth edges, and has a pimpled surface caused by the small com- 

 partments of young. 



Natica pusilla Say Southern Miniature Natica 



Plate 22) 



Cape Cod to Florida, the Gulf States, and the West Indies. 



/4 to Va inch in length, glossy-smooth, similar to clausa, but more ovate, 

 often with a small, open chink next to the umbilical callus, and is a much 



