MANUAL OF CONCHOLOGY. 



FAMILY NATIGID7E. 



Shell subglobular, spiral, or paucispiral, with or without 

 epidermis, the margin of the aperture entire. Operculum absent, 

 or present and paucispiral or concentric, corneous or calcareous. 



Animal with voluminous foot, often incapable of entirely 

 withdrawing into its shell; eyes at the base of the tentacles, 

 often subcutaneous ; shell often partially or entirely covered 

 by the mantle. Dentition 3'1 '3. 



The Naticidre have been monographed by 



Reeve, Conch. Iconica : Natica, 143 sp., 1855. Sigaretus, 26 

 sp., 1864. Yanikoro, 24 sp., 1875. 



Philippi, in Kiister's Conchylien Cabinet, 1852 : Natica, 190 

 species. 



Weinkauff, in Kiister : Sigaretus, 3t species, 1883. 



Sowerby, in Thesaurus Conchyliorum : Sigaretus, 28 sp., 1882. 

 Yanikoro, 24 sp., 1884. Natica, 144 sp., 1883. 



Recluz, in Chenu's Illustrations Conchyliologiques, etc. 



The present work admits about 225 recent species belonging 

 to the family ; many of those recognized by previous mono- 

 graphers being considered synonyms : besides these there are 

 many unfigured and undetermined forms. 



Subfamily I. Naticinde. 



Shell turbinate, subglobose or auriform, the spire usuall}' 

 short; aperture entire, without canal or sinus, the outer lip 

 sharp, not reflected or margined, the columellar lip callous, more 

 or less reflected over the umbilicus. Operculum calcareous or 

 corneous, paucispiral (PI. 1, figs. 12-14). 



