Bills in the nature of original bills are those for the purpose of cross litigation or for the purpose of controverting or suspending or reversing some decree of court or for carrying it into execution. The various classes of bills in this division are as follows:

Cross bills;

Bills of review and bills in the nature of bills of review;

Bills to impeach a decree on the ground of fraud.

Bills to suspend or avoid the operation of decrees;

Bills to carry decrees into execution.