MANUAL OP CONCHOLOGY. 



Family NATIGID.E. 



Shell subglobular, spiral, or paucispiral, -R-itli 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 entirel}^ covered 

 b}"- the mantle. Dentition 3*1 -3. 



The Naticidffi have been monographed by 



Reeve, Conch. Iconica : Natica, 143 sp., 1855. Sigaretus, 2fi 

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



Philippi, in Kiister's Conch3^1ien Cabinet, 1852 : Natica, 190 

 species. 



Weinkauff, in Kiister : Sigaretus, 37 species, 1883. 



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

 Vanikoro, 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- 

 grapliers being considered synonyms : besides these there are 

 many unfigured and undetermined forms. 



Subfamily I. Naticinse. 



Shell turbinate, subglobose or auriform, the spire usually 

 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). 



