A challenge of a juror for a cause which carries with it, prima facie , evident marks of suspicion either of malice or favor; as that a juror is of kin to either party within the ninth degree; that he has an interest in the cause, etc. 3 Bl. Comm. 303. A species of challenge to the array made on account of partiality or some default in the sheriff or his under-offi- cer who arrayed the panel