2. It is the duty of the under-tutor to act for the minor, whenever the interest of the minor is in opposition to the interest of the tutor. Civil Code, art. 300, 301; 1 N. S. 462; 9 M. R. 643; 11 L. R. 189; Poth. Des Personnes, partie prem. tit. 6, s. 5, art. 2. Vide Pro-curator; Protutor.