Actually, I think you may be referring to the record checkbox instead. This works much like it does in a grid view where you can select multiple records at one time and perform an action such as Duplicate record, Create record template, Apply template, Add comment, Copy record URL, and Delete record. To view the options, select a record by clicking the checkbox and right-click:
If you select multiple records and then right-click, you can delete multiple records at once:
Please let me know if you're referring to something else!