Can not delete Free Space on iMac 5K: Partition doesn't appear in CS list

I recently tried to install a bootcamp instance of Win 8.1. The install failed for some reason (wasn't clear from the error message). This left me with an unaddressable partition. I erased that partition in Disk Utility but now I am left with a hunk of Free Space that refuses to be deleted or merged with my Macintosh HD partition.

When I try to delete it from the UI nothing happens -- no error nothing. It just sits there. When I do it from the command prompt I get an error saying that operation isn't available.

PLEASE HELP!

Here's the output of the $diskutil cd list command. Note that this is a 1.1 TB drive and the 250GB Free Space partition doesn't show up here:

CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group B7C59032-4924-48FD-AE6C-6B937F443A5E
    =========================================================
    Name:         Macintosh HD
    Status:       Online
    Size:         842855342080 B (842.9 GB)
    Free Space:   114688 B (114.7 KB)
    |
    +-< Physical Volume 11715AE4-D61A-404B-8B5F-84E03E196A5C
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     120988852224 B (121.0 GB)
    |
    +-< Physical Volume 93E06B6F-E206-419D-9ED7-16426463BB3E
    |   ----------------------------------------------------
    |   Index:    1
    |   Disk:     disk1s2
    |   Status:   Online
    |   Size:     721866489856 B (721.9 GB)
    |
    +-> Logical Volume Family 294984BD-084E-40FB-8FD2-3B3DE40FA921
        ----------------------------------------------------------
        Encryption Status:       Unlocked
        Encryption Type:         None
        Conversion Status:       NoConversion
        Conversion Direction:    -none-
        Has Encrypted Extents:   No
        Fully Secure:            No
        Passphrase Required:     No
        |
        +-> Logical Volume DD3595D9-58B6-4745-8EC9-816F9ABE30E9
            ---------------------------------------------------
            Disk:                  disk2
            Status:                Online
            Size (Total):          836999970816 B (837.0 GB)
            Conversion Progress:   -none-
            Revertible:            No
            LV Name:               Macintosh HD
            Volume Name:           Macintosh HD
            Content Hint:          Apple_HFS

and for comparison the output of $diskutil list:

/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         121.0 GB   disk0s2
   3:                 Apple_Boot Boot OS X               134.2 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk1
   1:                        EFI EFI                     209.7 MB   disk1s1
   2:          Apple_CoreStorage                         721.9 GB   disk1s2
   3:                 Apple_Boot Boot OS X               650.0 MB   disk1s3
   4:                        EFI NO NAME                 104.9 MB   disk1s4
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           *837.0 GB   disk2
                                 Logical Volume on disk0s2, disk1s2
                                 DD3595D9-58B6-4745-8EC9-816F9ABE30E9
                                 Unencrypted Fusion Drive

Finally here is a shot of the disk utility UI: