It was communicated bj Mr. Elliott, who informed 

 me that it inhabits the southern shores of Florida. 



REFERENCE TO THE PLATE, 



Fig J, front vi6\v^ enlarged, 



a natural length 

 Fl 49 



CERITHIUM SEPTEMSTRIATUM, 



SPECIFIC CHARACTER. 



With longitudmal costae and transverse striae ; the costae 

 bifid towards the base ; volutions blackish, white above. 



•DESCRIPTION. 



Shell turreted, with longitudinal ribs rendered some- 

 what nodulous by the passage of elevated spiral striae over 

 them ; ribs thirteen on the body whorl, their interstices 

 much more deeply excavated near the suture, and each 

 divided into two on the basal half; spiral striae on the body 

 whorl seven, with smaller parallel stride between them, on 

 the second whorl are four striae, and on the third three ; 

 volutions nine ; suture not indented ; aperture oblique, 

 oval-orbicular, dark livid within and not distinctly stria- 

 ted j lahrum .vhitish on the inner margin, often interrupt- 

 ed by small brown lines corresponding with the exterior 

 strisc, exterior margin slightly thickened ; labium concave 

 with a callous at the junction with the labrum, and with 



