PLATE CLXXVIir. 



We feel a much slighter degree of hesitation in admitting this to be 

 the Shell meant by Mr. Adams, in the paper above quoted, than 

 the preceding species ; notwithstanding that our Shell has a greater 

 number of whorls ; the outline of his figure is rude, and far from 

 characteristic of the shell. — Our specimens are from Anglesea, as 

 before mentioned. It is represented both of the natural fize and mag- 

 nified, in the plate. 



FIG. III. 

 TURBO COSTATUS. 



RIBBED PTRE^TH SHELL. 

 SPECIFIC CHARACTER. 



Shell taper, snowy white, with numerous obtuse longitudinal ribs. 



Turbo Costatus : testa turrita nivea costis longitudinalibus nu- 

 merosis obtusis. 



Specimens of this elegant shell w^ere found at Margate. The 

 smallest figure denotes the natural fize. 



FIG. IV. 

 TURBO PALLIDUS. 



Py4LE H'-REATH SHELL. 

 SPECIFIC CHARACTER. 



Shell somewhat taper, pale ; whorls very sliglitly bicarinated. 



