For the whole. Si plures sint fidejussores, quotquot erunt nu- mero,singuli in solidum tenentur, if there be several sureties, however numerous they may be, they are individually bound for thewhole debt. Inst. 3, 21, 4. In parte sive in soliduin, for a part or for the whole. Id. 4. J,10. See Id. 4, 6, 20; Id. 4, 7, 2.