apt-get is not working properly

Dear Friends I am trying to install my ncurses package in my Ubuntu Distro. I am getting the following error. But i dont know what is the problem. Can anyone help me Code: mamse@mamse-ThinkCentre-M80:~/linux-3.15.8$ sudo apt-get install ncurses-develReading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package ncurses-devel mamse@mamse-ThinkCentre-M80:~/linux-3.15.8$