PLATE CLIX. 



A shell found at Sandwich." — The description does not strictly cor- 

 respond with our shell, the figure is yet more remote. Some degree 

 of ambiguity arises from this particular circumstance ; in our shell the 

 wreaths are uniformly lineated spirally, with three prominent rows 

 of tubercles, or more correctly speaking, granulations, except on 

 the first wreath, where they are more numerous, and the interme- 

 diate series on every wreath, consists of smaller granulations than 

 those on either side of it. The term punctatis, on the contrary, 

 which Mr. Walker has adopted, must rather imply a dot depressed : 

 in the engraving also, by which his description is elucidated, the dots 

 appear to be disposed in three distinct series upon each wreath, as 

 the granulations are in the shell before us, but each dot is apparently 

 depressed, and situated in the center of a quadrangular compartment: 

 at the same time also it must be remarked, that the intermediate series 

 of these dots on every wreath, are of an equal magnitude with the 

 others. The aperture, whatever might be the shell designed, is mise- 

 rably expressed, as are indeed the figures both of the natural size, and 

 magnified. We suspect upon the whole, they are intended for our 

 shell, and were it not for the objections stated, should insert a re- 

 ference to his figure, plate 3. No. 48. as a synonym. 



