"Band Marbled Cone"
Regarded as a subspecies of C. bandanus by Filmer, Röckel, Korn & Kohn regard it as a form.
Not known
Solomon Islands, Admirality Islands, Samoa
65 mm
Specimens agreeing with the description of C. nigrescens show a gradual transition from the typical C. bandanus pattern to almost black shells. In Western Samoa, 6% of the population have nearly black shells, while in American Samoa, the pattern is like that of C. bandanus elsewhere. Shell size is similar in American Samoa and Western Samoa. The habitat is very similar in American Samoa and Hawaii (Purtymun, 1977).