Install Ubuntu on Yosemite - no detected operating system

I have a 2012 MBP running Yosemite and a Live CD of Ubuntu 12.04 LTS. It runs fine, but when I get to the install part it only gives me options to delete the hard disk (no operating system detected) or something else (which im not comfortable with).

I've googled for hours and still am no where. Has anyone had this issue/know how to get around it?