The venom duct of Conus geographus. Insert: Conus geographus shell. Main figure: schematic of its venom duct. The segments of the venom duct are labeled as Proximal (P, in blue)--‒connected to the bulb, Proximal Central (PC, in purple), Distal Central (DC, in red), and Distal (D, in green) closest to the pharynx.
Hu et al. BMC Genomics 2012 13:284 doi:10.1186/1471-2164-13-284