The other species of bills in equity are not of very great importance.

A bill may be brought, as a matter of right, to set aside a decree which has been obtained by fraud.

The use of bills to suspend or avoid the operation of decrees, which were formerly common in England, especially in times of great political disturbance, have become obsolete in this country.

"Bills to effectuate or carry out decrees are filed to carry a decree into execution when, by reason of neglect of the parties or from some other cause, it has become impossible to do so without the further decree of the court to that end."