154 SPECIFIC 



of the whoils with a double, tumid hue 3 cleft in 

 the lip deep. 



Inhabits the Indian Ocean. 



Fig. 6. M. Vertagiis. 



Shell having the upper whorls of the spire j)lait- 

 ed; beak ascending, columella with one internal 

 plait. 



Lhlcr Conch, tab. 1020. fig. 23. 



Shell brownish white, aperture white, polished j 

 whorls rounded, j)laited on the upper margin, se- 

 parated by a groove, lower ones nearly smooth ; 

 beak short. 



Inhabits India. 



PLATE XIX. 



Fig. 1 . Trochus perspectivus. 



Shell convex, obtuse, margined ; umbilicus per- 

 vious, crenulate. 



Lister Conch, tab. G36. fig. 24. 



Specimen white, with ochraceous spots on the 

 margin and suture of the whorls ; umbilicus fun- 

 nel-shaped, surrounded by a spiral crenate margin; 



