The several persons who have subscribed any money towards the undertaking, or their legal representatives respectively, shall pay the sums respectively so subscribed, or such portions thereof as shall from time to time be called for by the company, at such times and places as shall be appointed by the company; and with respect to the provisions herein or in the special Act contained for enforcing the payment of calls, the word “shareholder” shall extend to and include the legal personal representatives of such shareholder.