GENERA OF SHELLS. 97 



mulata, granitella, araneosa, litterata, scripta, tricolor, 

 sanguinolenta, mastelina, lugubris, funebralis, glandiformis,- 

 Peruviana, Senegalensis, fusiformis, undata,inflata,bicincta, 

 harpularia, hepatica, ustulata, avellana, tessellata, carneola, 

 ispidula, oriola, Candida, volutella, tigrina, Brasiliana, utricu- 

 lus, auricularia,acuminata, subulata, luteola, testacea, hiatula, 

 obtusaria, Zeilanica, nebulosa, fabagina, conoidalis, unda- 

 tella, eburnea, nana, zonalis, oryza, mutica. 



CONUS. Shell turbinate or inversely conic, 

 convolute. Aperture longitudinal, narrow, 

 not toothed, effuse at base. 



The olivse are distinguished from the cylindrical 

 cones, by the channel which separates the whorls of 

 the spire and by the striae on the columella; from 

 voluta and mitra by the spiral whorls of those shells 

 being separated by simple unchannelled sutures. It 

 has also a prominent callus at the upper end of the 

 columellar lip, which assists in forming the channel of 

 the spire. 



(1.) Shell crowned. 



C. marmoreus, bandanus, nocturnus, Nicobaricus, araneosus, 

 zonatus, imperialis, fuscatus, viridulus, regius, cedonulli, 

 aurantius, nebulosus, minimus, sulcatus, hebrgeus, vermicu- 

 latus, arenatus, pulicarius, fastigatus, obesus, varius, tulipa, 

 geographus, punctatus, ta3nia(us, musicus, miliaris, mus, 

 lividus, Barbadensis, roseus, cardinalis, Magellanicus, distans, 

 pontificalis, Caledonicus, sponsalis, puncturatus, Ceylanicus, 

 lamellosus, pusillus, exiguus, asper. 



(2.) Shell not crowned. 



C. millepunctatus, litteratus, eburneus, tessellatus, gener- 



alis, Maldivus, Malacanus, lineatus, monile, centurio, vitu- 



linus, vulpinus, flavidus, virgo, daucus, pastinaca, capita- 



neusjclassiarius, vittatus, mustelinus, vexillum, Sumatrensis, 



7 



