Description:
The dark cerith, is synonymous with the Florida cerith (C. floridanum).  The shell is elongate, reaching 1 to 1.5 inches, and has a sharp apex.  There are approximately 10 whorls with distinct sutures and elevated, beaded ridges of 18 - 20 beads per whorl.  Unequal lines and ridges cover the entire surface of the shell.  Color is white or gray with brown or red-brown spiral markings.  Aperture is small and oval, with a well developed siphonal canal. 

Habitat:
The dark cerith is a common inhabitant of the shallow intertidal to subtidal zones.

Similar Species:
The dark cerith is similar in overall appearance to the stocky cerith, Cerithium litteratum.  They are distinguished in that the dark cerith is larger, and has a more elongate shape, with smaller, more numerous beads decorating the shell.

Range:
Dark ceriths range from North Carolina through Florida, Texas, and south to Brazil.