212 NATICID^. 



Species of Naticina. 



acutniuata, Adams and Reeve. Linneana, Recliiz. 



bilix, Gonr. mamillaris, Linn. 



Desmoulinsiana, Recluz. papilla, Gmel. 



Gouldiana, Recluz. sulcata, Recluz. 

 LamarckiaDa, Recluz. 



Genus CATINUS, Klein. 



Operculigerous lobe greatly developed, nearly covering 

 and concealing the shell. 



Operculum very small and rudimentary. 



Shell oval, flattened, ear-shaped, striated; spire minute, 

 depressed; aperture very wide, oblique; umbilicus none; 

 inner lip curved posteriorly, and spread thinly over the 

 body-whorl. 



Syn. Stomatia, Hill, not Lam. Auris-Veneris, Humph. 

 Auriforrais, Gevers. Haliotis, Adans., not Linn. Cryp- 

 tostoma, Blainv. 



Ex. C. Leachii, Blainville, pi. 22, fig. 8. Operculum, 

 C. concavus, Lamarck, fig. 8, a, 8, h. Shell, C. concavus, 

 fig. 8, c. 



The Catini come from the West Indies, China, India, 

 and South America. They live on muddy sand-flats; in 

 their habits they are sluggish and slow-moving, and very 

 timid ; when crawling they constantly explore the surface 

 with the produced fore lobe of the foot, which is also the 

 instrument employed in burrowing in the sand ; the oper- 

 culum, very small, will be found under the hind part of 

 the body-whorl of the shell. 



