SEC. 42. All barrels, boxes, or other packages in transit containing lobsters shall be marked with the word lobsters in capital letters, at least 1 inch in length, together with the full name of the shipper. Said marking shall be placed in a plain and legible manner on the outside of such barrel, boxes, or other packages; and in case of seizure by any duly authorized officer of any barrels, boxes, or other packages in transit, containing lobsters, which are not so marked, or in case of seizure by such officer of barrels, boxes, or other packages in transit containing lobsters less than the prescribed length, such lobsters as are alive and less than the prescribed length shall be liberated and all such lobsters as are of the prescribed length found in such barrels, boxes, or packages, together with such barrels, boxes, and packages, shall be forfeited and disposed of under the provisions of section 47 of this act. SEC. 43. Every person, firm, association, or corporation who ships lobsters without having the barrels, boxes, or other packages in which the same are contained marked as prescribed in the previous section shall upon conviction be punished by a fine of $25, and upon subsequent conviction thereof by a fine of $50; and any person or corporation in the business of a common carrier of merchandise who shall carry or transport from place to place lobsters in barrels, boxes, or other packages not so marked shall be liable to a penalty of $50 upon such conviction thereof. SEC. 44. All cars in which lobsters are kept, and all lobster cars while in the water, shall have the name of the owner or owners thereof on the top of the car, where it may plainly be seen, in letters not less than three-fourths of an inch in length, plainly carved or branded thereon, and all traps, cars, or other devices for the catching of lobsters shall have, while in the water, the owner's name carved or branded in like manner on all the buoys attached to said traps or other devices, under a penalty of $10 for each car and $5 for each trap or device not so marked; and if sufficient proof to establish the ownership of such cars or traps can not be readily obtained, they may be declared forfeited, subject to the provisions of section 47 of this act. SEC. 45. All persons are hereby prohibited from setting any lobster traps within 300 feet of the mouth or outer end of the leaders of any fish weir, under a penalty of $10 for each offense.