DESCRIPTION. 175 



what cinereous ; lip white/ ^ominent and lunate 5 

 margin acute. 



Inhabits the Mediterranean and West Indies. 



Fig. 4. P. Equestris, 



Shell orbicular, wrinkled outwardly ; lip ver- 

 tical, perpendicular. 



Lister Conch, tab. 546. fig. 38. 



Specimen white, hyaline, conical, obliquely 

 truncate at the base, covered with irregular folds, 

 wrinkles, and striae ; lip projecting, a little oblique, 

 open on one side, situated under the centre of the 

 vertex, formed like a canal. 



Inhabits the Indian and American seas. 



Fig. 5. P. Granatina, 



Shell angular, broader at one end, with nume- 

 rous muricate striae. 



Lister Conch, tab. 534. fig. 13. 



Specimen outwardly white, with dark brown and 

 chesnut spots and scales mostly angular ; vertex 

 brown ; within like ivory, vertex with a large tawny 

 brown spot square at one end; margin brown ; ribs 

 many, unequal. 



