CEKITHIUM.— Plate II. 



thick, distinct from the last whorl, having a large 



callus, outer lip fluted. 

 Lamarck, Anira. sans vert. Cerithium sp. 12. 



Cerithinm mutaium, Sowerby. 

 Hab. Island of Annaa, Society Islands ; Cuming. 



Cliaracterized by large tubercles pointing outwards and 

 upwards. 



Species II. (ilus. Cuming.) 



Ckhithium Adansoni. Cerilh. Udd irreijulari, elongato- 

 venfricosd, alba, rvfo-punctatd, spiraliter striata, tu- 

 berculis acutis cxtaulibus armatd, anfractibus nume- 

 rosis, medio angulatis, aperturd parviusculd, callo pos- 

 tico crasHo, canali brevi, labro echinato. 



Adanson's Cerithium. Sliell irregular, elongated, 

 veutricose, white, with reddish spots, spirally striated, 

 armed with acute standing-out tubercles, whorls nu- 

 merous, angular in the centre, aperture rather small, 

 ]iosterior callus thick, canal short, outer lip spinous. 



BuuGuiERE, Enc. Meth. t. I. p. 479. 



Hnh. Island of Annaa ; Cuming. Senegal ; Adanson. 



In this speries the spinous tubercles are more numerous, 

 and the general surface of the shell more rugose, than in 

 C. Kcliiimtum. It is also of a narrower form. 



Species 12. (Mus. Cuming.) 



Cerithium adustdm. Cerith. testd ventrieosd, obsciiri 

 nigrescente, liiieis interruplis et iiebulis variegatd, spi- 

 raliter striata, anfractibus ad latera compressiusctilis, 

 medio et prope suturam noduloriim seriebus cinctis, 

 aperturd utrinqiie canaliculatd, versus spirant elevald, 

 columelld postice callo magna instructd, antice lamel- 

 latd, rejiexd, canali brevi, labro viiiiufe deiiticnlato et 

 punctato. 



'I'jiE BURNT Cerithium. Shell veutricose, obscurely 

 blackish, variegated with interrupted lines and cloudy 

 spots, spirally striated, whorls slightly compressed at 

 the sides, in the centre and near the suture surrounded 

 with rows of nodules, aperture with a canal at each 

 end, elevated towards the spire, columella with a 

 large callus at the back, lamellated in front and re- 

 fleeted, canal short, outer lip minutely denticulated 

 and punctured. 



KiENER, Sp. Conch, p. 37. pi. 13. f. 2. 

 Hab. Galapagos Island ; Cuming. 



A well-known veutricose, cloudily-marked species. 



