SharePoint 2013 REST response: jasonObject.d.result is undefined but jasonObject.d is fine

I am testing a SharePoint hosted app Menu Action.

I have written a REST call that brings back all the properties in a document item.

I get a valid response but when I unpick my response I run into difficulties

         var results = jsonObject.d;    // **note jsonObject.d.result is undefined**

Why is this? do I need add anything to my http header or url

This has a knock on effect in that for each below as 'e' is also undefined. I want my code to be robust an reusable - is there anything I need to do?

            $.each(results, function (i, e) {
                // ul.append("<li>" + e.Title + "</li>");
                itemHTML += "<li>" + e.Name + "</li>";
                console.log(e.Name);
            });