For the whole. Bi plures sint fldejussores, quotquot eruni nu mero, singuli in solidwm tenentur, if there be several sureties, however numerous they may be, they are individually bound for the whole debt. Inst 3, 21, 4. In parte sive in solidum, for a part or for the whole.. Id. 4, 1, 16. See Id. 4, 6, 20; Id. 4, 7, 2.