No person shall set any pot or trap for any lobster or crab without having the pot or trap and buoy attached, plainly carved or branded with his last name and initials. No person shall use or set in any tidal water any car or other contrivance for holding or keeping lobsters or crabs without having such car or contrivance plainly marked with the last name and initials carved or branded thereon. Any pots, traps, cars or other contrivance used to catch or store lobsters or crabs in violation of any provision hereof and any lobsters or crabs therein shall be forfeited.