Primary Partition is NTFS on external hard drive. 2nd partition (exFAT) not visible.

I am using MBA 2013 with Yosemite and Windows 8.1 installed via BootCamp.
I am using an external Hard Drive (SONY 1TB) with a primary NTFS partition of 830GB and a secondary partition of 100+GB exFAT.
Both were created using Windows.
When I connect my Hard Drive to my Mac while running Yosemite only one (830GB NTFS) partition is visible.

I have checked many threads and my problem seems to be different.