EDIT

e.g.:

http http://api.cybertaxonomy.org/euromed/description/namedAreasInUse includeAllParents==true pageIndex==4      

{
    "class": "DefaultPagerImpl",
    "count": 138,
    "currentIndex": 0,
    "firstRecord": 1,
    "indices": [
        0,
        1,
        2
    ],
    "lastRecord": 30,
    "nextIndex": 1,
    "pageSize": 30,
    "pagesAvailable": 5,
    "prevIndex": null,